61455378315032 has 64 divisors (see below), whose sum is σ = 130646525100000. Its totient is φ = 26866498535424.

The previous prime is 61455378315031. The next prime is 61455378315041. The reversal of 61455378315032 is 23051387355416.

It is a super-2 number, since 2×61455378315032² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61455378315031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8655128 + ... + 14064920.

Almost surely, 2^{61455378315032} is an apocalyptic number.

It is an amenable number.

61455378315032 is an abundant number, since it is smaller than the sum of its proper divisors (69191146784968).

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

61455378315032 is a wasteful number, since it uses less digits than its factorization.

61455378315032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5415580 (or 5415576 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 53.

The spelling of 61455378315032 in words is "sixty-one trillion, four hundred fifty-five billion, three hundred seventy-eight million, three hundred fifteen thousand, thirty-two".