6400161761 has 16 divisors (see below), whose sum is σ = 7947816960. Its totient is φ = 5029471440.

The previous prime is 6400161709. The next prime is 6400161763. The reversal of 6400161761 is 1671610046.

It is a happy number.

It is not a de Polignac number, because 6400161761 - 2¹⁰ = 6400160737 is a prime.

It is a super-2 number, since 2×6400161761² = 81924141133933242242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400161763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772031 + ... + 780276.

It is an arithmetic number, because the mean of its divisors is an integer number (496738560).

Almost surely, 2^6400161761 is an apocalyptic number.

It is an amenable number.

6400161761 is a deficient number, since it is larger than the sum of its proper divisors (1547655199).

6400161761 is a wasteful number, since it uses less digits than its factorization.

6400161761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552364.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 6400161761 is about 80001.0109998617. The cubic root of 6400161761 is about 1856.6511755644.

The spelling of 6400161761 in words is "six billion, four hundred million, one hundred sixty-one thousand, seven hundred sixty-one".