157761498421 has 12 divisors (see below), whose sum is σ = 167812833792. Its totient is φ = 148281381864.

The previous prime is 157761498361. The next prime is 157761498437. The reversal of 157761498421 is 124894167751.

It is not a de Polignac number, because 157761498421 - 2³³ = 149171563829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157761498481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674675 + ... + 1766368.

It is an arithmetic number, because the mean of its divisors is an integer number (13984402816).

Almost surely, 2^157761498421 is an apocalyptic number.

It is an amenable number.

157761498421 is a deficient number, since it is larger than the sum of its proper divisors (10051335371).

157761498421 is a wasteful number, since it uses less digits than its factorization.

157761498421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441208 (or 3441189 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 55.

The spelling of 157761498421 in words is "one hundred fifty-seven billion, seven hundred sixty-one million, four hundred ninety-eight thousand, four hundred twenty-one".