123561567670 has 128 divisors (see below), whose sum is σ = 244043165952. Its totient is φ = 44865945600.

The previous prime is 123561567667. The next prime is 123561567671. The reversal of 123561567670 is 76765165321.

It is a super-2 number, since 2×123561567670² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123561567671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 189221064 + ... + 189221716.

It is an arithmetic number, because the mean of its divisors is an integer number (1906587234).

Almost surely, 2^123561567670 is an apocalyptic number.

123561567670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123561567670 is a deficient number, since it is larger than the sum of its proper divisors (120481598282).

123561567670 is a wasteful number, since it uses less digits than its factorization.

123561567670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 123561567670 in words is "one hundred twenty-three billion, five hundred sixty-one million, five hundred sixty-seven thousand, six hundred seventy".