15745747620 has 48 divisors (see below), whose sum is σ = 44100967680. Its totient is φ = 4197639936.

The previous prime is 15745747613. The next prime is 15745747627. The reversal of 15745747620 is 2674754751.

It is an interprime number because it is at equal distance from previous prime (15745747613) and next prime (15745747627).

It is a super-2 number, since 2×15745747620² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15745747620.

It is not an unprimeable number, because it can be changed into a prime (15745747627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179061 + ... + 252099.

It is an arithmetic number, because the mean of its divisors is an integer number (918770160).

Almost surely, 2^15745747620 is an apocalyptic number.

15745747620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15745747620 is an abundant number, since it is smaller than the sum of its proper divisors (28355220060).

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

15745747620 is a wasteful number, since it uses less digits than its factorization.

15745747620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76644 (or 76642 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 15745747620 in words is "fifteen billion, seven hundred forty-five million, seven hundred forty-seven thousand, six hundred twenty".