855770709925 has 72 divisors (see below), whose sum is σ = 1169934327000. Its totient is φ = 620091064320.

The previous prime is 855770709847. The next prime is 855770709929. The reversal of 855770709925 is 529907077558.

It can be written as a sum of positive squares in 36 ways, for example, as 807153105889 + 48617604036 = 898417^2 + 220494^2 .

It is not a de Polignac number, because 855770709925 - 2⁷ = 855770709797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855770709929) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 65574801 + ... + 65587849.

It is an arithmetic number, because the mean of its divisors is an integer number (16249087875).

Almost surely, 2^855770709925 is an apocalyptic number.

855770709925 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

855770709925 is a deficient number, since it is larger than the sum of its proper divisors (314163617075).

855770709925 is a wasteful number, since it uses less digits than its factorization.

855770709925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13435 (or 13413 counting only the distinct ones).

The product of its (nonzero) digits is 55566000, while the sum is 64.

The spelling of 855770709925 in words is "eight hundred fifty-five billion, seven hundred seventy million, seven hundred nine thousand, nine hundred twenty-five".