61207912449 has 6 divisors (see below), whose sum is σ = 88411429106. Its totient is φ = 40805274960.

The previous prime is 61207912421. The next prime is 61207912457. The reversal of 61207912449 is 94421970216.

61207912449 is a `hidden beast` number, since 6 + 120 + 79 + 12 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55699304049 + 5508608400 = 236007^2 + 74220^2 .

It is not a de Polignac number, because 61207912449 - 2⁷ = 61207912321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61207916449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3400439572 + ... + 3400439589.

Almost surely, 2^61207912449 is an apocalyptic number.

It is an amenable number.

61207912449 is a deficient number, since it is larger than the sum of its proper divisors (27203516657).

61207912449 is a wasteful number, since it uses less digits than its factorization.

61207912449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800879167 (or 6800879164 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 61207912449 in words is "sixty-one billion, two hundred seven million, nine hundred twelve thousand, four hundred forty-nine".