61993679472 has 90 divisors (see below), whose sum is σ = 179273789136. Its totient is φ = 19997916480.

The previous prime is 61993679453. The next prime is 61993679491. The reversal of 61993679472 is 27497639916.

61993679472 is a `hidden beast` number, since 6 + 1 + 9 + 93 + 6 + 79 + 472 = 666.

It is an interprime number because it is at equal distance from previous prime (61993679453) and next prime (61993679491).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 85608 + ... + 362375.

Almost surely, 2^61993679472 is an apocalyptic number.

61993679472 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

61993679472 is an abundant number, since it is smaller than the sum of its proper divisors (117280109664).

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

61993679472 is a wasteful number, since it uses less digits than its factorization.

61993679472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448059 (or 448019 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The spelling of 61993679472 in words is "sixty-one billion, nine hundred ninety-three million, six hundred seventy-nine thousand, four hundred seventy-two".