6461156537 has 4 divisors (see below), whose sum is σ = 7048534416. Its totient is φ = 5873778660.

The previous prime is 6461156531. The next prime is 6461156543. The reversal of 6461156537 is 7356511646.

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 an interprime number because it is at equal distance from previous prime (6461156531) and next prime (6461156543).

It is a cyclic number.

It is not a de Polignac number, because 6461156537 - 2⁸ = 6461156281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6461156531) 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, 293688923 + ... + 293688944.

It is an arithmetic number, because the mean of its divisors is an integer number (1762133604).

Almost surely, 2^6461156537 is an apocalyptic number.

It is an amenable number.

6461156537 is a deficient number, since it is larger than the sum of its proper divisors (587377879).

6461156537 is a wasteful number, since it uses less digits than its factorization.

6461156537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587377878.

The product of its digits is 453600, while the sum is 44.

The square root of 6461156537 is about 80381.3195773744. The cubic root of 6461156537 is about 1862.5306187901.

The spelling of 6461156537 in words is "six billion, four hundred sixty-one million, one hundred fifty-six thousand, five hundred thirty-seven".