61919842904 has 8 divisors (see below), whose sum is σ = 116099705460. Its totient is φ = 30959921448.

The previous prime is 61919842867. The next prime is 61919842927. The reversal of 61919842904 is 40924891916.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 3869990174 + ... + 3869990189.

Almost surely, 2^61919842904 is an apocalyptic number.

It is an amenable number.

61919842904 is a deficient number, since it is larger than the sum of its proper divisors (54179862556).

61919842904 is a wasteful number, since it uses less digits than its factorization.

61919842904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739980369 (or 7739980365 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 61919842904 in words is "sixty-one billion, nine hundred nineteen million, eight hundred forty-two thousand, nine hundred four".