61572336438 has 16 divisors (see below), whose sum is σ = 128498789376. Its totient is φ = 19631759400.

The previous prime is 61572336421. The next prime is 61572336439. The reversal of 61572336438 is 83463327516.

It is a super-2 number, since 2×61572336438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61572336439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223088038 + ... + 223088313.

It is an arithmetic number, because the mean of its divisors is an integer number (8031174336).

Almost surely, 2^61572336438 is an apocalyptic number.

61572336438 is an abundant number, since it is smaller than the sum of its proper divisors (66926452938).

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

61572336438 is a wasteful number, since it uses less digits than its factorization.

61572336438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446176379.

The product of its digits is 2177280, while the sum is 48.

The spelling of 61572336438 in words is "sixty-one billion, five hundred seventy-two million, three hundred thirty-six thousand, four hundred thirty-eight".