61861888370 has 32 divisors (see below), whose sum is σ = 118156278528. Its totient is φ = 23238851328.

The previous prime is 61861888357. The next prime is 61861888483. The reversal of 61861888370 is 7388816816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314264 + ... + 471683.

It is an arithmetic number, because the mean of its divisors is an integer number (3692383704).

Almost surely, 2^61861888370 is an apocalyptic number.

61861888370 is a deficient number, since it is larger than the sum of its proper divisors (56294390158).

61861888370 is a wasteful number, since it uses less digits than its factorization.

61861888370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786434.

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 61861888370 in words is "sixty-one billion, eight hundred sixty-one million, eight hundred eighty-eight thousand, three hundred seventy".