7825640661573 has 12 divisors (see below), whose sum is σ = 12137728373280. Its totient is φ = 4471794663672.

The previous prime is 7825640661569. The next prime is 7825640661577. The reversal of 7825640661573 is 3751660465287.

It is an interprime number because it is at equal distance from previous prime (7825640661569) and next prime (7825640661577).

It is not a de Polignac number, because 7825640661573 - 2² = 7825640661569 is a prime.

It is a super-2 number, since 2×7825640661573² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7825640661577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26617825233 + ... + 26617825526.

It is an arithmetic number, because the mean of its divisors is an integer number (1011477364440).

Almost surely, 2^{7825640661573} is an apocalyptic number.

It is an amenable number.

7825640661573 is a deficient number, since it is larger than the sum of its proper divisors (4312087711707).

7825640661573 is a wasteful number, since it uses less digits than its factorization.

7825640661573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53235650776 (or 53235650769 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 7825640661573 in words is "seven trillion, eight hundred twenty-five billion, six hundred forty million, six hundred sixty-one thousand, five hundred seventy-three".