61451037454400 has 168 divisors, whose sum is σ = 167042167962240. Its totient is φ = 22062972672000.

The previous prime is 61451037454379. The next prime is 61451037454453. The reversal of 61451037454400 is 445473015416.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20707931 + ... + 23488730.

Almost surely, 2^{61451037454400} is an apocalyptic number.

It is an amenable number.

61451037454400 is an abundant number, since it is smaller than the sum of its proper divisors (105591130507840).

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

61451037454400 is a wasteful number, since it uses less digits than its factorization.

61451037454400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44196773 (or 44196758 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 61451037454400 in words is "sixty-one trillion, four hundred fifty-one billion, thirty-seven million, four hundred fifty-four thousand, four hundred".