157989997351 has 8 divisors (see below), whose sum is σ = 159161764608. Its totient is φ = 156821820000.

The previous prime is 157989997349. The next prime is 157989997357. The reversal of 157989997351 is 153799989751.

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 157989997351 - 2¹ = 157989997349 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 (157989997357) 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, 809100 + ... + 985201.

It is an arithmetic number, because the mean of its divisors is an integer number (19895220576).

Almost surely, 2^157989997351 is an apocalyptic number.

157989997351 is a deficient number, since it is larger than the sum of its proper divisors (1171767257).

157989997351 is a wasteful number, since it uses less digits than its factorization.

157989997351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794953.

The product of its digits is 192893400, while the sum is 73.

The spelling of 157989997351 in words is "one hundred fifty-seven billion, nine hundred eighty-nine million, nine hundred ninety-seven thousand, three hundred fifty-one".