61299009894438 has 32 divisors (see below), whose sum is σ = 136226516428800. Its totient is φ = 20432029132008.

The previous prime is 61299009894427. The next prime is 61299009894449. The reversal of 61299009894438 is 83449890099216.

61299009894438 is a `hidden beast` number, since 6 + 1 + 2 + 9 + 90 + 0 + 98 + 9 + 443 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (61299009894427) and next prime (61299009894449).

It is a super-2 number, since 2×61299009894438² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25916598 + ... + 28182761.

It is an arithmetic number, because the mean of its divisors is an integer number (4257078638400).

Almost surely, 2^{61299009894438} is an apocalyptic number.

61299009894438 is an abundant number, since it is smaller than the sum of its proper divisors (74927506534362).

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

61299009894438 is a wasteful number, since it uses less digits than its factorization.

61299009894438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54120353 (or 54120347 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 72.

The spelling of 61299009894438 in words is "sixty-one trillion, two hundred ninety-nine billion, nine million, eight hundred ninety-four thousand, four hundred thirty-eight".