1658777988042 has 48 divisors (see below), whose sum is σ = 4109975318592. Its totient is φ = 473645214720.

The previous prime is 1658777988037. The next prime is 1658777988061. The reversal of 1658777988042 is 2408897778561.

It is a super-2 number, since 2×1658777988042² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3840759 + ... + 4250762.

It is an arithmetic number, because the mean of its divisors is an integer number (85624485804).

Almost surely, 2^{1658777988042} is an apocalyptic number.

1658777988042 is an abundant number, since it is smaller than the sum of its proper divisors (2451197330550).

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

1658777988042 is a wasteful number, since it uses less digits than its factorization.

1658777988042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093163 (or 8093160 counting only the distinct ones).

The product of its (nonzero) digits is 379330560, while the sum is 72.

The spelling of 1658777988042 in words is "one trillion, six hundred fifty-eight billion, seven hundred seventy-seven million, nine hundred eighty-eight thousand, forty-two".