1825720775 has 24 divisors (see below), whose sum is σ = 2323538784. Its totient is φ = 1422233600.

The previous prime is 1825720759. The next prime is 1825720807. The reversal of 1825720775 is 5770275281.

It is not a de Polignac number, because 1825720775 - 2⁴ = 1825720759 is a prime.

It is a super-4 number, since 4×1825720775⁴ (a number of 38 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 661799 + ... + 664551.

It is an arithmetic number, because the mean of its divisors is an integer number (96814116).

Almost surely, 2^1825720775 is an apocalyptic number.

1825720775 is a deficient number, since it is larger than the sum of its proper divisors (497818009).

1825720775 is a wasteful number, since it uses less digits than its factorization.

1825720775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3446 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 44.

The square root of 1825720775 is about 42728.4539270964. The cubic root of 1825720775 is about 1222.2070536762.

The spelling of 1825720775 in words is "one billion, eight hundred twenty-five million, seven hundred twenty thousand, seven hundred seventy-five".