157040761 has 4 divisors (see below), whose sum is σ = 162106624. Its totient is φ = 151974900.

The previous prime is 157040753. The next prime is 157040791. The reversal of 157040761 is 167040751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 167040751 = 251 ⋅665501.

It is a cyclic number.

It is not a de Polignac number, because 157040761 - 2³ = 157040753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 5065831 = 157040761 / (1 + 5 + 7 + 0 + 4 + 0 + 7 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157040791) 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, 2532885 + ... + 2532946.

It is an arithmetic number, because the mean of its divisors is an integer number (40526656).

Almost surely, 2^157040761 is an apocalyptic number.

It is an amenable number.

157040761 is a deficient number, since it is larger than the sum of its proper divisors (5065863).

157040761 is an equidigital number, since it uses as much as digits as its factorization.

157040761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065862.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 157040761 is about 12531.5905215579. The cubic root of 157040761 is about 539.5157535806.

The spelling of 157040761 in words is "one hundred fifty-seven million, forty thousand, seven hundred sixty-one".