646230125456 has 20 divisors (see below), whose sum is σ = 1269222526092. Its totient is φ = 318688828416.

The previous prime is 646230125419. The next prime is 646230125477. The reversal of 646230125456 is 654521032646.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 366194419600 + 280035705856 = 605140^2 + 529184^2 .

It is a super-2 number, since 2×646230125456² (a number of 24 digits) contains 22 as substring.

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, 276638441 + ... + 276640776.

Almost surely, 2^646230125456 is an apocalyptic number.

It is an amenable number.

646230125456 is a deficient number, since it is larger than the sum of its proper divisors (622992400636).

646230125456 is a wasteful number, since it uses less digits than its factorization.

646230125456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553279298 (or 553279292 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 646230125456 in words is "six hundred forty-six billion, two hundred thirty million, one hundred twenty-five thousand, four hundred fifty-six".