387931258481 has 16 divisors (see below), whose sum is σ = 442780461648. Its totient is φ = 336695961600.

The previous prime is 387931258469. The next prime is 387931258493. The reversal of 387931258481 is 184852139783.

It is an interprime number because it is at equal distance from previous prime (387931258469) and next prime (387931258493).

It can be written as a sum of positive squares in 8 ways, for example, as 24793651600 + 363137606881 = 157460^2 + 602609^2 .

It is not a de Polignac number, because 387931258481 - 2³⁴ = 370751389297 is a prime.

It is a super-2 number, since 2×387931258481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 387931258481.

It is not an unprimeable number, because it can be changed into a prime (387931258381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633980 + ... + 1085261.

It is an arithmetic number, because the mean of its divisors is an integer number (27673778853).

Almost surely, 2^387931258481 is an apocalyptic number.

It is an amenable number.

387931258481 is a deficient number, since it is larger than the sum of its proper divisors (54849203167).

387931258481 is a wasteful number, since it uses less digits than its factorization.

387931258481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720292.

The product of its digits is 11612160, while the sum is 59.

The spelling of 387931258481 in words is "three hundred eighty-seven billion, nine hundred thirty-one million, two hundred fifty-eight thousand, four hundred eighty-one".