123051624561 has 12 divisors (see below), whose sum is σ = 178538284288. Its totient is φ = 81666547704.

The previous prime is 123051624539. The next prime is 123051624593. The reversal of 123051624561 is 165426150321.

123051624561 is a `hidden beast` number, since 1 + 2 + 30 + 5 + 1 + 62 + 4 + 561 = 666.

It is not a de Polignac number, because 123051624561 - 2⁹ = 123051624049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123051624461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30653605 + ... + 30657618.

Almost surely, 2^123051624561 is an apocalyptic number.

It is an amenable number.

123051624561 is a deficient number, since it is larger than the sum of its proper divisors (55486659727).

123051624561 is a wasteful number, since it uses less digits than its factorization.

123051624561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61311452 (or 61311449 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 123051624561 its reverse (165426150321), we get a palindrome (288477774882).

The spelling of 123051624561 in words is "one hundred twenty-three billion, fifty-one million, six hundred twenty-four thousand, five hundred sixty-one".