16457472772 has 12 divisors (see below), whose sum is σ = 31016006476. Its totient is φ = 7595756640.

The previous prime is 16457472643. The next prime is 16457472817. The reversal of 16457472772 is 27727475461.

It can be written as a sum of positive squares in 2 ways, for example, as 8974530756 + 7482942016 = 94734^2 + 86504^2 .

It is a super-2 number, since 2×16457472772² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 316489861 = 16457472772 / (1 + 6 + 4 + 5 + 7 + 4 + 7 + 2 + 7 + 7 + 2).

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, 158244879 + ... + 158244982.

Almost surely, 2^16457472772 is an apocalyptic number.

It is an amenable number.

16457472772 is a deficient number, since it is larger than the sum of its proper divisors (14558533704).

16457472772 is a wasteful number, since it uses less digits than its factorization.

16457472772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316489878 (or 316489876 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 52.

The spelling of 16457472772 in words is "sixteen billion, four hundred fifty-seven million, four hundred seventy-two thousand, seven hundred seventy-two".