157745554 has 8 divisors (see below), whose sum is σ = 239859900. Its totient is φ = 77792256.

The previous prime is 157745551. The next prime is 157745561. The reversal of 157745554 is 455547751.

It can be written as a sum of positive squares in 2 ways, for example, as 156125025 + 1620529 = 12495^2 + 1273^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 157745554.

It is not an unprimeable number, because it can be changed into a prime (157745551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540079 + ... + 540370.

Almost surely, 2^157745554 is an apocalyptic number.

157745554 is a deficient number, since it is larger than the sum of its proper divisors (82114346).

157745554 is a wasteful number, since it uses less digits than its factorization.

157745554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080524.

The product of its digits is 490000, while the sum is 43.

The square root of 157745554 is about 12559.6796933680. The cubic root of 157745554 is about 540.3216579279.

The spelling of 157745554 in words is "one hundred fifty-seven million, seven hundred forty-five thousand, five hundred fifty-four".