157651601 has 8 divisors (see below), whose sum is σ = 161670600. Its totient is φ = 153640960.

The previous prime is 157651597. The next prime is 157651621. The reversal of 157651601 is 106156751.

It can be written as a sum of positive squares in 4 ways, for example, as 801025 + 156850576 = 895^2 + 12524^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 157651601 - 2² = 157651597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157651621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56405 + ... + 59133.

It is an arithmetic number, because the mean of its divisors is an integer number (20208825).

Almost surely, 2^157651601 is an apocalyptic number.

It is an amenable number.

157651601 is a deficient number, since it is larger than the sum of its proper divisors (4018999).

157651601 is a wasteful number, since it uses less digits than its factorization.

157651601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 157651601 is about 12555.9388736964. The cubic root of 157651601 is about 540.2143650518.

The spelling of 157651601 in words is "one hundred fifty-seven million, six hundred fifty-one thousand, six hundred one".