6461733657 has 4 divisors (see below), whose sum is σ = 8615644880. Its totient is φ = 4307822436.

The previous prime is 6461733637. The next prime is 6461733673. The reversal of 6461733657 is 7563371646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6461733657 - 2¹⁰ = 6461732633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461733637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1076955607 + ... + 1076955612.

It is an arithmetic number, because the mean of its divisors is an integer number (2153911220).

Almost surely, 2^6461733657 is an apocalyptic number.

It is an amenable number.

6461733657 is a deficient number, since it is larger than the sum of its proper divisors (2153911223).

6461733657 is a wasteful number, since it uses less digits than its factorization.

6461733657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153911222.

The product of its digits is 1905120, while the sum is 48.

The square root of 6461733657 is about 80384.9093860284. The cubic root of 6461733657 is about 1862.5860717967.

The spelling of 6461733657 in words is "six billion, four hundred sixty-one million, seven hundred thirty-three thousand, six hundred fifty-seven".