61398054528 has 64 divisors (see below), whose sum is σ = 165852856800. Its totient is φ = 20119129088.

The previous prime is 61398054521. The next prime is 61398054569. The reversal of 61398054528 is 82545089316.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×61398054528² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61398054521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332351 + ... + 1377662.

Almost surely, 2^61398054528 is an apocalyptic number.

It is an amenable number.

61398054528 is an abundant number, since it is smaller than the sum of its proper divisors (104454802272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61398054528 is a wasteful number, since it uses less digits than its factorization.

61398054528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710089 (or 2710077 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 61398054528 in words is "sixty-one billion, three hundred ninety-eight million, fifty-four thousand, five hundred twenty-eight".