61312510001 has 4 divisors (see below), whose sum is σ = 61582609392. Its totient is φ = 61042410612.

The previous prime is 61312509977. The next prime is 61312510003. The reversal of 61312510001 is 10001521316.

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 a cyclic number.

It is not a de Polignac number, because 61312510001 - 2¹⁰ = 61312508977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61312510003) 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, 135049355 + ... + 135049808.

It is an arithmetic number, because the mean of its divisors is an integer number (15395652348).

Almost surely, 2^61312510001 is an apocalyptic number.

It is an amenable number.

61312510001 is a deficient number, since it is larger than the sum of its proper divisors (270099391).

61312510001 is a wasteful number, since it uses less digits than its factorization.

61312510001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270099390.

The product of its (nonzero) digits is 180, while the sum is 20.

The spelling of 61312510001 in words is "sixty-one billion, three hundred twelve million, five hundred ten thousand, one".