857540157980 has 24 divisors (see below), whose sum is σ = 1964546544240. Its totient is φ = 311832784640.

The previous prime is 857540157967. The next prime is 857540157989. The reversal of 857540157980 is 89751045758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857540157989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1948954685 + ... + 1948955124.

It is an arithmetic number, because the mean of its divisors is an integer number (81856106010).

Almost surely, 2^857540157980 is an apocalyptic number.

It is an amenable number.

857540157980 is an abundant number, since it is smaller than the sum of its proper divisors (1107006386260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857540157980 is a wasteful number, since it uses less digits than its factorization.

857540157980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897909829 (or 3897909827 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 59.

The spelling of 857540157980 in words is "eight hundred fifty-seven billion, five hundred forty million, one hundred fifty-seven thousand, nine hundred eighty".