157678742 has 16 divisors (see below), whose sum is σ = 263496240. Its totient is φ = 70264992.

The previous prime is 157678733. The next prime is 157678751. The reversal of 157678742 is 247876751.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (157678733) and next prime (157678751).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103808 + ... + 105315.

It is an arithmetic number, because the mean of its divisors is an integer number (16468515).

Almost surely, 2^157678742 is an apocalyptic number.

157678742 is a deficient number, since it is larger than the sum of its proper divisors (105817498).

157678742 is a wasteful number, since it uses less digits than its factorization.

157678742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209167.

The product of its digits is 658560, while the sum is 47.

The square root of 157678742 is about 12557.0196304696. The cubic root of 157678742 is about 540.2453640324.

The spelling of 157678742 in words is "one hundred fifty-seven million, six hundred seventy-eight thousand, seven hundred forty-two".