123456901356 has 72 divisors (see below), whose sum is σ = 342666913680. Its totient is φ = 38731571712.

The previous prime is 123456901343. The next prime is 123456901363. The reversal of 123456901356 is 653109654321.

123456901356 is a `hidden beast` number, since 1 + 2 + 34 + 569 + 0 + 1 + 3 + 56 = 666.

It is a super-2 number, since 2×123456901356² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3719161 + ... + 3752208.

It is an arithmetic number, because the mean of its divisors is an integer number (4759262690).

Almost surely, 2^123456901356 is an apocalyptic number.

It is an amenable number.

123456901356 is an abundant number, since it is smaller than the sum of its proper divisors (219210012324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123456901356 is a wasteful number, since it uses less digits than its factorization.

123456901356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7471405 (or 7471391 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 123456901356 in words is "one hundred twenty-three billion, four hundred fifty-six million, nine hundred one thousand, three hundred fifty-six".