28215554200756 has 12 divisors (see below), whose sum is σ = 53175467532292. Its totient is φ = 13022563477248.

The previous prime is 28215554200661. The next prime is 28215554200831. The reversal of 28215554200756 is 65700245551282.

It can be written as a sum of positive squares in 2 ways, for example, as 16179026003856 + 12036528196900 = 4022316^2 + 3469370^2 .

It is a super-2 number, since 2×28215554200756² (a number of 28 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: 542606811553 = 28215554200756 / (2 + 8 + 2 + 1 + 5 + 5 + 5 + 4 + 2 + 0 + 0 + 7 + 5 + 6).

It is a congruent number.

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, 271303405725 + ... + 271303405828.

Almost surely, 2^{28215554200756} is an apocalyptic number.

28215554200756 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28215554200756 is a deficient number, since it is larger than the sum of its proper divisors (24959913331536).

28215554200756 is a wasteful number, since it uses less digits than its factorization.

28215554200756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542606811570 (or 542606811568 counting only the distinct ones).

The product of its (nonzero) digits is 6720000, while the sum is 52.

The spelling of 28215554200756 in words is "twenty-eight trillion, two hundred fifteen billion, five hundred fifty-four million, two hundred thousand, seven hundred fifty-six".