654778372490 has 64 divisors (see below), whose sum is σ = 1328599082880. Its totient is φ = 230244560640.

The previous prime is 654778372477. The next prime is 654778372627. The reversal of 654778372490 is 94273877456.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169916 + ... + 1156904.

It is an arithmetic number, because the mean of its divisors is an integer number (20759360670).

Almost surely, 2^654778372490 is an apocalyptic number.

654778372490 is an abundant number, since it is smaller than the sum of its proper divisors (673820710390).

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

654778372490 is a wasteful number, since it uses less digits than its factorization.

654778372490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987207.

The product of its (nonzero) digits is 71124480, while the sum is 62.

The spelling of 654778372490 in words is "six hundred fifty-four billion, seven hundred seventy-eight million, three hundred seventy-two thousand, four hundred ninety".