1975726864 has 40 divisors (see below), whose sum is σ = 4062150720. Its totient is φ = 928887168.

The previous prime is 1975726853. The next prime is 1975726871. The reversal of 1975726864 is 4686275791.

It is a super-2 number, since 2×1975726864² = 7806993282262548992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23787 + ... + 67210.

It is an arithmetic number, because the mean of its divisors is an integer number (101553768).

Almost surely, 2^1975726864 is an apocalyptic number.

It is an amenable number.

1975726864 is an abundant number, since it is smaller than the sum of its proper divisors (2086423856).

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

1975726864 is a wasteful number, since it uses less digits than its factorization.

1975726864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91087 (or 91081 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The square root of 1975726864 is about 44449.1491932073. The cubic root of 1975726864 is about 1254.8032503744.

The spelling of 1975726864 in words is "one billion, nine hundred seventy-five million, seven hundred twenty-six thousand, eight hundred sixty-four".