157509494 has 8 divisors (see below), whose sum is σ = 236355408. Its totient is φ = 78724360.

The previous prime is 157509493. The next prime is 157509509. The reversal of 157509494 is 494905751.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157509491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8042 + ... + 19485.

It is an arithmetic number, because the mean of its divisors is an integer number (29544426).

Almost surely, 2^157509494 is an apocalyptic number.

157509494 is a deficient number, since it is larger than the sum of its proper divisors (78845914).

157509494 is a wasteful number, since it uses less digits than its factorization.

157509494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30390.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 157509494 is about 12550.2786423250. The cubic root of 157509494 is about 540.0520000221.

The spelling of 157509494 in words is "one hundred fifty-seven million, five hundred nine thousand, four hundred ninety-four".