61772755023 has 24 divisors (see below), whose sum is σ = 102019171488. Its totient is φ = 35283105792.

The previous prime is 61772755021. The next prime is 61772755067. The reversal of 61772755023 is 32055727716.

61772755023 is a `hidden beast` number, since 6 + 1 + 7 + 72 + 7 + 550 + 23 = 666.

It is not a de Polignac number, because 61772755023 - 2¹ = 61772755021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61772755023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61772755021) 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 23 ways as a sum of consecutive naturals, for example, 72490 + ... + 358887.

It is an arithmetic number, because the mean of its divisors is an integer number (4250798812).

Almost surely, 2^61772755023 is an apocalyptic number.

61772755023 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61772755023 is a deficient number, since it is larger than the sum of its proper divisors (40246416465).

61772755023 is a wasteful number, since it uses less digits than its factorization.

61772755023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433663 (or 433660 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 61772755023 in words is "sixty-one billion, seven hundred seventy-two million, seven hundred fifty-five thousand, twenty-three".