61997935329 has 80 divisors (see below), whose sum is σ = 103357495296. Its totient is φ = 36713023200.

The previous prime is 61997935327. The next prime is 61997935343. The reversal of 61997935329 is 92353979916.

61997935329 is a `hidden beast` number, since 6 + 1 + 9 + 9 + 7 + 93 + 532 + 9 = 666.

It is not a de Polignac number, because 61997935329 - 2¹ = 61997935327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61997935327) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 40494294 + ... + 40495824.

Almost surely, 2^61997935329 is an apocalyptic number.

It is an amenable number.

61997935329 is a deficient number, since it is larger than the sum of its proper divisors (41359559967).

61997935329 is a wasteful number, since it uses less digits than its factorization.

61997935329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568 (or 2559 counting only the distinct ones).

The product of its digits is 24800580, while the sum is 63.

The spelling of 61997935329 in words is "sixty-one billion, nine hundred ninety-seven million, nine hundred thirty-five thousand, three hundred twenty-nine".