623755390849 has 8 divisors (see below), whose sum is σ = 651652954920. Its totient is φ = 596283744000.

The previous prime is 623755390847. The next prime is 623755390873. The reversal of 623755390849 is 948093557326.

It can be written as a sum of positive squares in 4 ways, for example, as 404667738225 + 219087652624 = 636135^2 + 468068^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 623755390849 - 2¹ = 623755390847 is a prime.

It is a super-2 number, since 2×623755390849² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623755390847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106476312 + ... + 106482169.

It is an arithmetic number, because the mean of its divisors is an integer number (81456619365).

Almost surely, 2^623755390849 is an apocalyptic number.

It is an amenable number.

623755390849 is a deficient number, since it is larger than the sum of its proper divisors (27897564071).

623755390849 is a wasteful number, since it uses less digits than its factorization.

623755390849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212958611.

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 623755390849 in words is "six hundred twenty-three billion, seven hundred fifty-five million, three hundred ninety thousand, eight hundred forty-nine".