61979951075 has 48 divisors (see below), whose sum is σ = 93055026240. Its totient is φ = 39977349120.

The previous prime is 61979951071. The next prime is 61979951083. The reversal of 61979951075 is 57015997916.

It is not a de Polignac number, because 61979951075 - 2² = 61979951071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61979951071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6209789 + ... + 6219761.

It is an arithmetic number, because the mean of its divisors is an integer number (1938646380).

Almost surely, 2^61979951075 is an apocalyptic number.

61979951075 is a deficient number, since it is larger than the sum of its proper divisors (31075075165).

61979951075 is a wasteful number, since it uses less digits than its factorization.

61979951075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12096 (or 12091 counting only the distinct ones).

The product of its (nonzero) digits is 5358150, while the sum is 59.

The spelling of 61979951075 in words is "sixty-one billion, nine hundred seventy-nine million, nine hundred fifty-one thousand, seventy-five".