61614551 has 4 divisors (see below), whose sum is σ = 61633704. Its totient is φ = 61595400.

The previous prime is 61614547. The next prime is 61614557. The reversal of 61614551 is 15541616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61614551 - 2² = 61614547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61614557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (15408426).

Almost surely, 2^61614551 is an apocalyptic number.

61614551 is a deficient number, since it is larger than the sum of its proper divisors (19153).

61614551 is a wasteful number, since it uses less digits than its factorization.

61614551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19152.

The product of its digits is 3600, while the sum is 29.

The square root of 61614551 is about 7849.4936779387. The cubic root of 61614551 is about 394.9672589430.

The spelling of 61614551 in words is "sixty-one million, six hundred fourteen thousand, five hundred fifty-one".