28025525027778 has 16 divisors (see below), whose sum is σ = 56056719340800. Its totient is φ = 9340896795056.

The previous prime is 28025525027743. The next prime is 28025525027813. The reversal of 28025525027778 is 87772052552082.

It is an interprime number because it is at equal distance from previous prime (28025525027743) and next prime (28025525027813).

It is a super-2 number, since 2×28025525027778² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236155953 + ... + 236274596.

It is an arithmetic number, because the mean of its divisors is an integer number (3503544958800).

Almost surely, 2^{28025525027778} is an apocalyptic number.

28025525027778 is an abundant number, since it is smaller than the sum of its proper divisors (28031194313022).

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

28025525027778 is a wasteful number, since it uses less digits than its factorization.

28025525027778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472440441.

The product of its (nonzero) digits is 43904000, while the sum is 60.

The spelling of 28025525027778 in words is "twenty-eight trillion, twenty-five billion, five hundred twenty-five million, twenty-seven thousand, seven hundred seventy-eight".