981257153893 has 8 divisors (see below), whose sum is σ = 983080777536. Its totient is φ = 979433817600.

The previous prime is 981257153881. The next prime is 981257153927. The reversal of 981257153893 is 398351752189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981257153893 - 2⁵ = 981257153861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981257453893) 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, 7502448 + ... + 7632118.

It is an arithmetic number, because the mean of its divisors is an integer number (122885097192).

Almost surely, 2^981257153893 is an apocalyptic number.

It is an amenable number.

981257153893 is a deficient number, since it is larger than the sum of its proper divisors (1823623643).

981257153893 is a wasteful number, since it uses less digits than its factorization.

981257153893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143675.

The product of its digits is 16329600, while the sum is 61.

The spelling of 981257153893 in words is "nine hundred eighty-one billion, two hundred fifty-seven million, one hundred fifty-three thousand, eight hundred ninety-three".