61910564 has 12 divisors (see below), whose sum is σ = 108597888. Its totient is φ = 30882600.

The previous prime is 61910561. The next prime is 61910567. The reversal of 61910564 is 46501916.

61910564 = 143² + 144² + ... + 573².

It is an interprime number because it is at equal distance from previous prime (61910561) and next prime (61910567).

It is a super-3 number, since 3×61910564³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61910564.

It is not an unprimeable number, because it can be changed into a prime (61910561) 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, 16232 + ... + 19679.

It is an arithmetic number, because the mean of its divisors is an integer number (9049824).

Almost surely, 2^61910564 is an apocalyptic number.

It is an amenable number.

61910564 is a deficient number, since it is larger than the sum of its proper divisors (46687324).

61910564 is a wasteful number, since it uses less digits than its factorization.

61910564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36346 (or 36344 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61910564 is about 7868.3266327727. The cubic root of 61910564 is about 395.5987586364.

The spelling of 61910564 in words is "sixty-one million, nine hundred ten thousand, five hundred sixty-four".