61767808938 has 24 divisors (see below), whose sum is σ = 145996639776. Its totient is φ = 18717517800.

The previous prime is 61767808931. The next prime is 61767808943. The reversal of 61767808938 is 83980876716.

61767808938 is a `hidden beast` number, since 617 + 6 + 7 + 8 + 0 + 8 + 9 + 3 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (61767808931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155979118 + ... + 155979513.

It is an arithmetic number, because the mean of its divisors is an integer number (6083193324).

Almost surely, 2^61767808938 is an apocalyptic number.

61767808938 is an abundant number, since it is smaller than the sum of its proper divisors (84228830838).

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

61767808938 is a wasteful number, since it uses less digits than its factorization.

61767808938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311958650 (or 311958647 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 61767808938 in words is "sixty-one billion, seven hundred sixty-seven million, eight hundred eight thousand, nine hundred thirty-eight".