61253831807 has 4 divisors (see below), whose sum is σ = 70004379216. Its totient is φ = 52503284400.

The previous prime is 61253831803. The next prime is 61253831819. The reversal of 61253831807 is 70813835216.

It is a happy number.

61253831807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61253831807 - 2² = 61253831803 is a prime.

It is a super-2 number, since 2×61253831807² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61253831803) 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, 4375273694 + ... + 4375273707.

It is an arithmetic number, because the mean of its divisors is an integer number (17501094804).

Almost surely, 2^61253831807 is an apocalyptic number.

61253831807 is a deficient number, since it is larger than the sum of its proper divisors (8750547409).

61253831807 is an equidigital number, since it uses as much as digits as its factorization.

61253831807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8750547408.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 61253831807 in words is "sixty-one billion, two hundred fifty-three million, eight hundred thirty-one thousand, eight hundred seven".