1516777778052 has 36 divisors (see below), whose sum is σ = 3845126406576. Its totient is φ = 504135549360.

The previous prime is 1516777778039. The next prime is 1516777778081. The reversal of 1516777778052 is 2508777776151.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1516777778052² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60697474 + ... + 60722457.

Almost surely, 2^{1516777778052} is an apocalyptic number.

1516777778052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1516777778052 is an abundant number, since it is smaller than the sum of its proper divisors (2328348628524).

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

1516777778052 is a wasteful number, since it uses less digits than its factorization.

1516777778052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121420288 (or 121420283 counting only the distinct ones).

The product of its (nonzero) digits is 40336800, while the sum is 63.

The spelling of 1516777778052 in words is "one trillion, five hundred sixteen billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, fifty-two".