61445815632 has 30 divisors (see below), whose sum is σ = 171962942762. Its totient is φ = 20481938496.

The previous prime is 61445815619. The next prime is 61445815661. The reversal of 61445815632 is 23651854416.

61445815632 is a `hidden beast` number, since 6 + 1 + 4 + 4 + 5 + 8 + 1 + 5 + 632 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56556449856 + 4889365776 = 237816^2 + 69924^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 213353383 + ... + 213353670.

Almost surely, 2^61445815632 is an apocalyptic number.

It is an amenable number.

61445815632 is an abundant number, since it is smaller than the sum of its proper divisors (110517127130).

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

61445815632 is a wasteful number, since it uses less digits than its factorization.

61445815632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426707067 (or 426707058 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 61445815632 in words is "sixty-one billion, four hundred forty-five million, eight hundred fifteen thousand, six hundred thirty-two".