61885954531 has 4 divisors (see below), whose sum is σ = 62227866064. Its totient is φ = 61544043000.

The previous prime is 61885954511. The next prime is 61885954561. The reversal of 61885954531 is 13545958816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61885954531 - 2²⁷ = 61751736803 is a prime.

It is a super-2 number, since 2×61885954531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61885954511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170955495 + ... + 170955856.

It is an arithmetic number, because the mean of its divisors is an integer number (15556966516).

Almost surely, 2^61885954531 is an apocalyptic number.

61885954531 is a deficient number, since it is larger than the sum of its proper divisors (341911533).

61885954531 is a wasteful number, since it uses less digits than its factorization.

61885954531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341911532.

The product of its digits is 5184000, while the sum is 55.

The spelling of 61885954531 in words is "sixty-one billion, eight hundred eighty-five million, nine hundred fifty-four thousand, five hundred thirty-one".