1555560061 has 16 divisors (see below), whose sum is σ = 1809941760. Its totient is φ = 1321223680.

The previous prime is 1555560047. The next prime is 1555560073. The reversal of 1555560061 is 1600655551.

It is not a de Polignac number, because 1555560061 - 2⁷ = 1555559933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1555559999 and 1555560026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555560011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4741 + ... + 55978.

It is an arithmetic number, because the mean of its divisors is an integer number (113121360).

Almost surely, 2^1555560061 is an apocalyptic number.

1555560061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1555560061 is a deficient number, since it is larger than the sum of its proper divisors (254381699).

1555560061 is a wasteful number, since it uses less digits than its factorization.

1555560061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60884.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 1555560061 is about 39440.5890042225. The cubic root of 1555560061 is about 1158.6766669405.

The spelling of 1555560061 in words is "one billion, five hundred fifty-five million, five hundred sixty thousand, sixty-one".