61571383875 has 64 divisors (see below), whose sum is σ = 114036249600. Its totient is φ = 32781074400.

The previous prime is 61571383873. The next prime is 61571383879. The reversal of 61571383875 is 57838317516.

61571383875 is a `hidden beast` number, since 6 + 1 + 571 + 38 + 38 + 7 + 5 = 666.

It is not a de Polignac number, because 61571383875 - 2¹ = 61571383873 is a prime.

It is a super-2 number, since 2×61571383875² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61571383873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1965586 + ... + 1996664.

It is an arithmetic number, because the mean of its divisors is an integer number (1781816400).

Almost surely, 2^61571383875 is an apocalyptic number.

61571383875 is a deficient number, since it is larger than the sum of its proper divisors (52464865725).

61571383875 is a wasteful number, since it uses less digits than its factorization.

61571383875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31690 (or 31674 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 61571383875 in words is "sixty-one billion, five hundred seventy-one million, three hundred eighty-three thousand, eight hundred seventy-five".