646451576770 has 64 divisors (see below), whose sum is σ = 1213400678400. Its totient is φ = 247698648000.

The previous prime is 646451576759. The next prime is 646451576783. The reversal of 646451576770 is 77675154646.

It is a happy number.

It is a super-2 number, since 2×646451576770² (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 31 ways as a sum of consecutive naturals, for example, 13222831 + ... + 13271629.

It is an arithmetic number, because the mean of its divisors is an integer number (18959385600).

Almost surely, 2^646451576770 is an apocalyptic number.

646451576770 is a deficient number, since it is larger than the sum of its proper divisors (566949101630).

646451576770 is a wasteful number, since it uses less digits than its factorization.

646451576770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49271.

The product of its (nonzero) digits is 29635200, while the sum is 58.

It can be divided in two parts, 646451 and 576770, that added together give a palindrome (1223221).

The spelling of 646451576770 in words is "six hundred forty-six billion, four hundred fifty-one million, five hundred seventy-six thousand, seven hundred seventy".