61721476038 has 32 divisors (see below), whose sum is σ = 137264256000. Its totient is φ = 20558012328.

The previous prime is 61721476031. The next prime is 61721476039. The reversal of 61721476038 is 83067412716.

61721476038 is a `hidden beast` number, since 6 + 17 + 21 + 4 + 7 + 603 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61721475984 and 61721476002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61721476031) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 368238 + ... + 508961.

It is an arithmetic number, because the mean of its divisors is an integer number (4289508000).

Almost surely, 2^61721476038 is an apocalyptic number.

61721476038 is an abundant number, since it is smaller than the sum of its proper divisors (75542779962).

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

61721476038 is a wasteful number, since it uses less digits than its factorization.

61721476038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878513 (or 878507 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 61721476038 in words is "sixty-one billion, seven hundred twenty-one million, four hundred seventy-six thousand, thirty-eight".