531250920326478 has 64 divisors (see below), whose sum is σ = 1203628729572864. Its totient is φ = 154907172288000.

The previous prime is 531250920326443. The next prime is 531250920326509. The reversal of 531250920326478 is 874623029052135.

It is a super-2 number, since 2×531250920326478² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1344482778 + ... + 1344877853.

It is an arithmetic number, because the mean of its divisors is an integer number (18806698899576).

It is a 1-persistent number, because it is pandigital, but 2⋅531250920326478 = 1062501840652956 is not.

Almost surely, 2^{531250920326478} is an apocalyptic number.

531250920326478 is an abundant number, since it is smaller than the sum of its proper divisors (672377809246386).

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

531250920326478 is a wasteful number, since it uses less digits than its factorization.

531250920326478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689360761.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 531250920326478 in words is "five hundred thirty-one trillion, two hundred fifty billion, nine hundred twenty million, three hundred twenty-six thousand, four hundred seventy-eight".