61506601571007 has 24 divisors (see below), whose sum is σ = 92501731624848. Its totient is φ = 39348485596800.

The previous prime is 61506601570987. The next prime is 61506601571017. The reversal of 61506601571007 is 70017510660516.

61506601571007 is a `hidden beast` number, since 6 + 1 + 506 + 60 + 15 + 71 + 0 + 0 + 7 = 666.

It is not a de Polignac number, because 61506601571007 - 2⁸ = 61506601570751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506601571017) 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, 1366244353 + ... + 1366289370.

It is an arithmetic number, because the mean of its divisors is an integer number (3854238817702).

Almost surely, 2^{61506601571007} is an apocalyptic number.

61506601571007 is a deficient number, since it is larger than the sum of its proper divisors (30995130053841).

61506601571007 is a wasteful number, since it uses less digits than its factorization.

61506601571007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732533831 (or 2732533828 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 61506601571007 in words is "sixty-one trillion, five hundred six billion, six hundred one million, five hundred seventy-one thousand, seven".