123620517772 has 12 divisors (see below), whose sum is σ = 216339350920. Its totient is φ = 61809274656.

The previous prime is 123620517653. The next prime is 123620517847. The reversal of 123620517772 is 277715026321.

It is an unprimeable number.

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, 86479 + ... + 504697.

Almost surely, 2^123620517772 is an apocalyptic number.

It is an amenable number.

123620517772 is a deficient number, since it is larger than the sum of its proper divisors (92718833148).

123620517772 is a wasteful number, since it uses less digits than its factorization.

123620517772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492120 (or 492118 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 123620517772 in words is "one hundred twenty-three billion, six hundred twenty million, five hundred seventeen thousand, seven hundred seventy-two".