157738749 has 32 divisors (see below), whose sum is σ = 247188480. Its totient is φ = 87599232.

The previous prime is 157738723. The next prime is 157738787. The reversal of 157738749 is 947837751.

It is not a de Polignac number, because 157738749 - 2⁵ = 157738717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157738709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276937 + ... + 277505.

It is an arithmetic number, because the mean of its divisors is an integer number (7724640).

Almost surely, 2^157738749 is an apocalyptic number.

It is an amenable number.

157738749 is a deficient number, since it is larger than the sum of its proper divisors (89449731).

157738749 is a wasteful number, since it uses less digits than its factorization.

157738749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929.

The product of its digits is 1481760, while the sum is 51.

The square root of 157738749 is about 12559.4087838560. The cubic root of 157738749 is about 540.3138881542.

The spelling of 157738749 in words is "one hundred fifty-seven million, seven hundred thirty-eight thousand, seven hundred forty-nine".