15768777540040 has 128 divisors (see below), whose sum is σ = 42366003816960. Its totient is φ = 5164683853824.

The previous prime is 15768777540031. The next prime is 15768777540073. The reversal of 15768777540040 is 4004577786751.

It is a happy 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, 3394312 + ... + 6561928.

It is an arithmetic number, because the mean of its divisors is an integer number (330984404820).

Almost surely, 2^{15768777540040} is an apocalyptic number.

15768777540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15768777540040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21183001908480).

15768777540040 is an abundant number, since it is smaller than the sum of its proper divisors (26597226276920).

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

15768777540040 is a wasteful number, since it uses less digits than its factorization.

15768777540040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168431 (or 3168427 counting only the distinct ones).

The product of its (nonzero) digits is 46099200, while the sum is 61.

The spelling of 15768777540040 in words is "fifteen trillion, seven hundred sixty-eight billion, seven hundred seventy-seven million, five hundred forty thousand, forty".