531345073761780 has 72 divisors (see below), whose sum is σ = 1540837533904032. Its totient is φ = 136806087944064.

The previous prime is 531345073761659. The next prime is 531345073761823. The reversal of 531345073761780 is 87167370543135.

It is a super-2 number, since 2×531345073761780² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5264962162 + ... + 5265063081.

Almost surely, 2^{531345073761780} is an apocalyptic number.

It is an amenable number.

531345073761780 is an abundant number, since it is smaller than the sum of its proper divisors (1009492460142252).

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

531345073761780 is a wasteful number, since it uses less digits than its factorization.

531345073761780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10530025313 (or 10530025282 counting only the distinct ones).

The product of its (nonzero) digits is 44452800, while the sum is 60.

The spelling of 531345073761780 in words is "five hundred thirty-one trillion, three hundred forty-five billion, seventy-three million, seven hundred sixty-one thousand, seven hundred eighty".