646152705477 has 24 divisors (see below), whose sum is σ = 948307202336. Its totient is φ = 423870882336.

The previous prime is 646152705469. The next prime is 646152705481. The reversal of 646152705477 is 774507251646.

646152705477 is a `hidden beast` number, since 6 + 4 + 61 + 527 + 0 + 54 + 7 + 7 = 666.

It is not a de Polignac number, because 646152705477 - 2³ = 646152705469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646152705487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43798 + ... + 1137639.

Almost surely, 2^646152705477 is an apocalyptic number.

646152705477 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

646152705477 is a deficient number, since it is larger than the sum of its proper divisors (302154496859).

646152705477 is a wasteful number, since it uses less digits than its factorization.

646152705477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182417 (or 1182414 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 54.

The spelling of 646152705477 in words is "six hundred forty-six billion, one hundred fifty-two million, seven hundred five thousand, four hundred seventy-seven".