61207912450 has 12 divisors (see below), whose sum is σ = 113846717250. Its totient is φ = 24483164960.

The previous prime is 61207912421. The next prime is 61207912457. The reversal of 61207912450 is 5421970216.

It can be written as a sum of positive squares in 3 ways, for example, as 45796428001 + 15411484449 = 214001^2 + 124143^2 .

It is not an unprimeable number, because it can be changed into a prime (61207912457) 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, 612079075 + ... + 612079174.

Almost surely, 2^61207912450 is an apocalyptic number.

61207912450 is a deficient number, since it is larger than the sum of its proper divisors (52638804800).

61207912450 is a wasteful number, since it uses less digits than its factorization.

61207912450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224158261 (or 1224158256 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 61207912450 in words is "sixty-one billion, two hundred seven million, nine hundred twelve thousand, four hundred fifty".