61651507201056 has 36 divisors (see below), whose sum is σ = 175321473603822. Its totient is φ = 20550502400256.

The previous prime is 61651507201043. The next prime is 61651507201111. The reversal of 61651507201056 is 65010270515616.

It is a happy number.

61651507201056 is a `hidden beast` number, since 6 + 1 + 6 + 515 + 0 + 7 + 20 + 105 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60913591840656 + 737915360400 = 7804716^2 + 859020^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107033866381 + ... + 107033866956.

Almost surely, 2^{61651507201056} is an apocalyptic number.

It is an amenable number.

61651507201056 is an abundant number, since it is smaller than the sum of its proper divisors (113669966402766).

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

61651507201056 is a wasteful number, since it uses less digits than its factorization.

61651507201056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214067733353 (or 214067733342 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 61651507201056 in words is "sixty-one trillion, six hundred fifty-one billion, five hundred seven million, two hundred one thousand, fifty-six".