61381934972 has 6 divisors (see below), whose sum is σ = 107418386208. Its totient is φ = 30690967484.

The previous prime is 61381934951. The next prime is 61381934987. The reversal of 61381934972 is 27943918316.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7672741868 + ... + 7672741875.

It is an arithmetic number, because the mean of its divisors is an integer number (17903064368).

Almost surely, 2^61381934972 is an apocalyptic number.

It is an amenable number.

61381934972 is a deficient number, since it is larger than the sum of its proper divisors (46036451236).

61381934972 is a wasteful number, since it uses less digits than its factorization.

61381934972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15345483747 (or 15345483745 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The spelling of 61381934972 in words is "sixty-one billion, three hundred eighty-one million, nine hundred thirty-four thousand, nine hundred seventy-two".