1025975572821 has 24 divisors (see below), whose sum is σ = 1561359714720. Its totient is φ = 647404340256.

The previous prime is 1025975572813. The next prime is 1025975572877. The reversal of 1025975572821 is 1282755795201.

1025975572821 is a `hidden beast` number, since 1 + 0 + 2 + 5 + 9 + 7 + 557 + 2 + 82 + 1 = 666.

It is not a de Polignac number, because 1025975572821 - 2³ = 1025975572813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025975572891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2494695 + ... + 2876708.

It is an arithmetic number, because the mean of its divisors is an integer number (65056654780).

Almost surely, 2^{1025975572821} is an apocalyptic number.

It is an amenable number.

1025975572821 is a deficient number, since it is larger than the sum of its proper divisors (535384141899).

1025975572821 is a wasteful number, since it uses less digits than its factorization.

1025975572821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372545 (or 5372542 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 54.

The spelling of 1025975572821 in words is "one trillion, twenty-five billion, nine hundred seventy-five million, five hundred seventy-two thousand, eight hundred twenty-one".