623421537104 has 40 divisors (see below), whose sum is σ = 1238388941160. Its totient is φ = 303850188800.

The previous prime is 623421537103. The next prime is 623421537119. The reversal of 623421537104 is 401735124326.

It can be written as a sum of positive squares in 4 ways, for example, as 224694960400 + 398726576704 = 474020^2 + 631448^2 .

It is a super-2 number, since 2×623421537104² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623421537103) 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, 372392 + ... + 1177080.

It is an arithmetic number, because the mean of its divisors is an integer number (30959723529).

Almost surely, 2^623421537104 is an apocalyptic number.

It is an amenable number.

623421537104 is a deficient number, since it is larger than the sum of its proper divisors (614967404056).

623421537104 is a wasteful number, since it uses less digits than its factorization.

623421537104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805919 (or 805913 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 623421537104 in words is "six hundred twenty-three billion, four hundred twenty-one million, five hundred thirty-seven thousand, one hundred four".