61019773870 has 64 divisors (see below), whose sum is σ = 120372894720. Its totient is φ = 22086979200.

The previous prime is 61019773781. The next prime is 61019773981. The reversal of 61019773870 is 7837791016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37829184 + ... + 37830796.

It is an arithmetic number, because the mean of its divisors is an integer number (1880826480).

Almost surely, 2^61019773870 is an apocalyptic number.

61019773870 is a deficient number, since it is larger than the sum of its proper divisors (59353120850).

61019773870 is a wasteful number, since it uses less digits than its factorization.

61019773870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 61019773870 in words is "sixty-one billion, nineteen million, seven hundred seventy-three thousand, eight hundred seventy".