61520213264 has 40 divisors (see below), whose sum is σ = 119511850752. Its totient is φ = 30678560640.

The previous prime is 61520213257. The next prime is 61520213269. The reversal of 61520213264 is 46231202516.

61520213264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61520213264.

It is not an unprimeable number, because it can be changed into a prime (61520213269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11242049 + ... + 11247519.

Almost surely, 2^61520213264 is an apocalyptic number.

It is an amenable number.

61520213264 is a deficient number, since it is larger than the sum of its proper divisors (57991637488).

61520213264 is a wasteful number, since it uses less digits than its factorization.

61520213264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215 (or 7209 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 61520213264 in words is "sixty-one billion, five hundred twenty million, two hundred thirteen thousand, two hundred sixty-four".