61318223901 has 36 divisors (see below), whose sum is σ = 99618783264. Its totient is φ = 36298286640.

The previous prime is 61318223893. The next prime is 61318223921. The reversal of 61318223901 is 10932281316.

61318223901 is a `hidden beast` number, since 613 + 1 + 8 + 2 + 2 + 39 + 0 + 1 = 666.

It is not a de Polignac number, because 61318223901 - 2³ = 61318223893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61318223921) 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 35 ways as a sum of consecutive naturals, for example, 607905 + ... + 701558.

It is an arithmetic number, because the mean of its divisors is an integer number (2767188424).

Almost surely, 2^61318223901 is an apocalyptic number.

It is an amenable number.

61318223901 is a deficient number, since it is larger than the sum of its proper divisors (38300559363).

61318223901 is a wasteful number, since it uses less digits than its factorization.

61318223901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309534 (or 1309520 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 61318223901 in words is "sixty-one billion, three hundred eighteen million, two hundred twenty-three thousand, nine hundred one".