61150979997 has 32 divisors (see below), whose sum is σ = 92838130560. Its totient is φ = 39758221440.

The previous prime is 61150979987. The next prime is 61150980031. The reversal of 61150979997 is 79997905116.

61150979997 is a `hidden beast` number, since 611 + 5 + 0 + 9 + 7 + 9 + 9 + 9 + 7 = 666.

It is not a de Polignac number, because 61150979997 - 2²⁴ = 61134202781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61150979987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3519343 + ... + 3536675.

It is an arithmetic number, because the mean of its divisors is an integer number (2901191580).

Almost surely, 2^61150979997 is an apocalyptic number.

It is an amenable number.

61150979997 is a deficient number, since it is larger than the sum of its proper divisors (31687150563).

61150979997 is a wasteful number, since it uses less digits than its factorization.

61150979997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20570 (or 20564 counting only the distinct ones).

The product of its (nonzero) digits is 9644670, while the sum is 63.

The spelling of 61150979997 in words is "sixty-one billion, one hundred fifty million, nine hundred seventy-nine thousand, nine hundred ninety-seven".