61904636057 has 16 divisors (see below), whose sum is σ = 69127914240. Its totient is φ = 54948238800.

The previous prime is 61904636023. The next prime is 61904636063. The reversal of 61904636057 is 75063640916.

It is a cyclic number.

It is not a de Polignac number, because 61904636057 - 2⁶ = 61904635993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61904636657) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1367882 + ... + 1412412.

It is an arithmetic number, because the mean of its divisors is an integer number (4320494640).

Almost surely, 2^61904636057 is an apocalyptic number.

It is an amenable number.

61904636057 is a deficient number, since it is larger than the sum of its proper divisors (7223278183).

61904636057 is a wasteful number, since it uses less digits than its factorization.

61904636057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47524.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 61904636057 in words is "sixty-one billion, nine hundred four million, six hundred thirty-six thousand, fifty-seven".