9857157492 has 96 divisors (see below), whose sum is σ = 28394297344. Its totient is φ = 2591740800.

The previous prime is 9857157437. The next prime is 9857157509. The reversal of 9857157492 is 2947517589.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347817 + ... + 375087.

Almost surely, 2^9857157492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9857157492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14197148672).

9857157492 is an abundant number, since it is smaller than the sum of its proper divisors (18537139852).

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

9857157492 is a wasteful number, since it uses less digits than its factorization.

9857157492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27629 (or 27627 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 57.

The square root of 9857157492 is about 99283.2185819940. The cubic root of 9857157492 is about 2144.1272934952.

The spelling of 9857157492 in words is "nine billion, eight hundred fifty-seven million, one hundred fifty-seven thousand, four hundred ninety-two".