157699551 has 8 divisors (see below), whose sum is σ = 210831280. Its totient is φ = 104850432.

The previous prime is 157699541. The next prime is 157699559. The reversal of 157699551 is 155996751.

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

It is not a de Polignac number, because 157699551 - 2⁵ = 157699519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157699551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157699559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69346 + ... + 71583.

It is an arithmetic number, because the mean of its divisors is an integer number (26353910).

Almost surely, 2^157699551 is an apocalyptic number.

157699551 is a deficient number, since it is larger than the sum of its proper divisors (53131729).

157699551 is a wasteful number, since it uses less digits than its factorization.

157699551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141305.

The product of its digits is 425250, while the sum is 48.

The square root of 157699551 is about 12557.8481835066. The cubic root of 157699551 is about 540.2691285364.

The spelling of 157699551 in words is "one hundred fifty-seven million, six hundred ninety-nine thousand, five hundred fifty-one".