61545031883 has 4 divisors (see below), whose sum is σ = 61854303600. Its totient is φ = 61235760168.

The previous prime is 61545031871. The next prime is 61545031897. The reversal of 61545031883 is 38813054516.

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 61545031883 - 2¹⁸ = 61544769739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61545031783) 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, 154635560 + ... + 154635957.

It is an arithmetic number, because the mean of its divisors is an integer number (15463575900).

Almost surely, 2^61545031883 is an apocalyptic number.

61545031883 is a deficient number, since it is larger than the sum of its proper divisors (309271717).

61545031883 is a wasteful number, since it uses less digits than its factorization.

61545031883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309271716.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 61545031883 in words is "sixty-one billion, five hundred forty-five million, thirty-one thousand, eight hundred eighty-three".