61243264 has 32 divisors (see below), whose sum is σ = 122369400. Its totient is φ = 30531072.

The previous prime is 61243229. The next prime is 61243267. The reversal of 61243264 is 46234216.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×61243264³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61243267) 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, 70867 + ... + 71725.

Almost surely, 2^61243264 is an apocalyptic number.

61243264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

61243264 is a deficient number, since it is larger than the sum of its proper divisors (61126136).

61243264 is an equidigital number, since it uses as much as digits as its factorization.

61243264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1418 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 61243264 is about 7825.8075621625. The cubic root of 61243264 is about 394.1723073289.

The spelling of 61243264 in words is "sixty-one million, two hundred forty-three thousand, two hundred sixty-four".