375868312561 has 9 divisors (see below), whose sum is σ = 437239559961. Its totient is φ = 322169160852.

The previous prime is 375868312511. The next prime is 375868312639. The reversal of 375868312561 is 165213868573.

The square root of 375868312561 is 613081.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 375868312561 - 2¹⁷ = 375868181489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (375868312511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4247776 + ... + 4335358.

It is an arithmetic number, because the mean of its divisors is an integer number (48582173329).

Almost surely, 2^375868312561 is an apocalyptic number.

375868312561 is the 613081-st square number.

375868312561 is the 306541-st centered octagonal number.

It is an amenable number.

375868312561 is a deficient number, since it is larger than the sum of its proper divisors (61371247400).

375868312561 is an frugal number, since it uses more digits than its factorization.

375868312561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175180 (or 87590 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 375868312561 in words is "three hundred seventy-five billion, eight hundred sixty-eight million, three hundred twelve thousand, five hundred sixty-one".