125805215572 has 24 divisors (see below), whose sum is σ = 228062920680. Its totient is φ = 60678858240.

The previous prime is 125805215537. The next prime is 125805215579. The reversal of 125805215572 is 275512508521.

It can be written as a sum of positive squares in 4 ways, for example, as 6555169296 + 119250046276 = 80964^2 + 345326^2 .

It is a super-3 number, since 3×125805215572³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125805215579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4294983 + ... + 4324174.

It is an arithmetic number, because the mean of its divisors is an integer number (9502621695).

Almost surely, 2^125805215572 is an apocalyptic number.

It is an amenable number.

125805215572 is a deficient number, since it is larger than the sum of its proper divisors (102257705108).

125805215572 is a wasteful number, since it uses less digits than its factorization.

125805215572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8619291 (or 8619289 counting only the distinct ones).

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 125805215572 in words is "one hundred twenty-five billion, eight hundred five million, two hundred fifteen thousand, five hundred seventy-two".