101986780642 has 16 divisors (see below), whose sum is σ = 161095999680. Its totient is φ = 48328795152.

The previous prime is 101986780639. The next prime is 101986780663. The reversal of 101986780642 is 246087689101.

It is a self number, because there is not a number n which added to its sum of digits gives 101986780642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10165188 + ... + 10175215.

It is an arithmetic number, because the mean of its divisors is an integer number (10068499980).

Almost surely, 2^101986780642 is an apocalyptic number.

101986780642 is a deficient number, since it is larger than the sum of its proper divisors (59109219038).

101986780642 is a wasteful number, since it uses less digits than its factorization.

101986780642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340537.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 101986780642 in words is "one hundred one billion, nine hundred eighty-six million, seven hundred eighty thousand, six hundred forty-two".