16537415780 has 12 divisors (see below), whose sum is σ = 34728573180. Its totient is φ = 6614966304.

The previous prime is 16537415761. The next prime is 16537415803. The reversal of 16537415780 is 8751473561.

It can be written as a sum of positive squares in 2 ways, for example, as 10825986304 + 5711429476 = 104048^2 + 75574^2 .

It is a super-2 number, since 2×16537415780² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413435375 + ... + 413435414.

It is an arithmetic number, because the mean of its divisors is an integer number (2894047765).

Almost surely, 2^16537415780 is an apocalyptic number.

16537415780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16537415780 is an abundant number, since it is smaller than the sum of its proper divisors (18191157400).

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

16537415780 is a wasteful number, since it uses less digits than its factorization.

16537415780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826870798 (or 826870796 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 16537415780 in words is "sixteen billion, five hundred thirty-seven million, four hundred fifteen thousand, seven hundred eighty".