61207912458 has 192 divisors, whose sum is σ = 167951646720. Its totient is φ = 15648422400.

The previous prime is 61207912457. The next prime is 61207912471. The reversal of 61207912458 is 85421970216.

61207912458 is a `hidden beast` number, since 6 + 120 + 79 + 1 + 2 + 458 = 666.

It is not an unprimeable number, because it can be changed into a prime (61207912457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47191266 + ... + 47192562.

It is an arithmetic number, because the mean of its divisors is an integer number (874748160).

Almost surely, 2^61207912458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61207912458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83975823360).

61207912458 is an abundant number, since it is smaller than the sum of its proper divisors (106743734262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61207912458 is a wasteful number, since it uses less digits than its factorization.

61207912458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 61207912458 in words is "sixty-one billion, two hundred seven million, nine hundred twelve thousand, four hundred fifty-eight".