124664420505855 has 16 divisors (see below), whose sum is σ = 199651068190944. Its totient is φ = 66425025809280.

The previous prime is 124664420505817. The next prime is 124664420505883. The reversal of 124664420505855 is 558505024466421.

It is a happy number.

It is not a de Polignac number, because 124664420505855 - 2²¹ = 124664418408703 is a prime.

It is a super-2 number, since 2×124664420505855² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124664420505795 and 124664420505804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3916554004 + ... + 3916585833.

It is an arithmetic number, because the mean of its divisors is an integer number (12478191761934).

Almost surely, 2^{124664420505855} is an apocalyptic number.

124664420505855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

124664420505855 is a deficient number, since it is larger than the sum of its proper divisors (74986647685089).

124664420505855 is a wasteful number, since it uses less digits than its factorization.

124664420505855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7833140906.

The product of its (nonzero) digits is 46080000, while the sum is 57.

The spelling of 124664420505855 in words is "one hundred twenty-four trillion, six hundred sixty-four billion, four hundred twenty million, five hundred five thousand, eight hundred fifty-five".