61874807915 has 4 divisors (see below), whose sum is σ = 74249769504. Its totient is φ = 49499846328.

The previous prime is 61874807899. The next prime is 61874807923. The reversal of 61874807915 is 51970847816.

It is a happy number.

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 61874807915 - 2⁴ = 61874807899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6187480787 + ... + 6187480796.

It is an arithmetic number, because the mean of its divisors is an integer number (18562442376).

Almost surely, 2^61874807915 is an apocalyptic number.

61874807915 is a deficient number, since it is larger than the sum of its proper divisors (12374961589).

61874807915 is a wasteful number, since it uses less digits than its factorization.

61874807915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12374961588.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 61874807915 in words is "sixty-one billion, eight hundred seventy-four million, eight hundred seven thousand, nine hundred fifteen".