890078520654 has 24 divisors (see below), whose sum is σ = 1928629850472. Its totient is φ = 296673395760.

The previous prime is 890078520607. The next prime is 890078520659. The reversal of 890078520654 is 456025870098.

It is a super-2 number, since 2×890078520654² (a number of 25 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 890078520654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890078520659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1336749 + ... + 1888664.

It is an arithmetic number, because the mean of its divisors is an integer number (80359577103).

Almost surely, 2^890078520654 is an apocalyptic number.

890078520654 is an abundant number, since it is smaller than the sum of its proper divisors (1038551329818).

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

890078520654 is a wasteful number, since it uses less digits than its factorization.

890078520654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240752 (or 3240749 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 890078520654 in words is "eight hundred ninety billion, seventy-eight million, five hundred twenty thousand, six hundred fifty-four".