61106517451 has 4 divisors (see below), whose sum is σ = 69836019952. Its totient is φ = 52377014952.

The previous prime is 61106517421. The next prime is 61106517491. The reversal of 61106517451 is 15471560116.

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

It is a cyclic number.

It is not a de Polignac number, because 61106517451 - 2⁵ = 61106517419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61106517451.

It is not an unprimeable number, because it can be changed into a prime (61106517401) 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, 4364751240 + ... + 4364751253.

It is an arithmetic number, because the mean of its divisors is an integer number (17459004988).

Almost surely, 2^61106517451 is an apocalyptic number.

61106517451 is a deficient number, since it is larger than the sum of its proper divisors (8729502501).

61106517451 is an equidigital number, since it uses as much as digits as its factorization.

61106517451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8729502500.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 61106517451 in words is "sixty-one billion, one hundred six million, five hundred seventeen thousand, four hundred fifty-one".