623157131520 has 2304 divisors, whose sum is σ = 2896266240000. Its totient is φ = 127292497920.

The previous prime is 623157131447. The next prime is 623157131533. The reversal of 623157131520 is 25131751326.

623157131520 is a `hidden beast` number, since 6 + 2 + 3 + 1 + 571 + 31 + 52 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2304).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 10561985251 + ... + 10561985309.

It is an arithmetic number, because the mean of its divisors is an integer number (1257060000).

Almost surely, 2^623157131520 is an apocalyptic number.

623157131520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623157131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448133120000).

623157131520 is an abundant number, since it is smaller than the sum of its proper divisors (2273109108480).

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

623157131520 is an frugal number, since it uses more digits than its factorization.

623157131520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

Adding to 623157131520 its reverse (25131751326), we get a palindrome (648288882846).

The spelling of 623157131520 in words is "six hundred twenty-three billion, one hundred fifty-seven million, one hundred thirty-one thousand, five hundred twenty".