157279661 has 24 divisors (see below), whose sum is σ = 201599424. Its totient is φ = 121322880.

The previous prime is 157279627. The next prime is 157279669. The reversal of 157279661 is 166972751.

It is a de Polignac number, because none of the positive numbers 2^k-157279661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157279669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54101 + ... + 56933.

It is an arithmetic number, because the mean of its divisors is an integer number (8399976).

Almost surely, 2^157279661 is an apocalyptic number.

157279661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157279661 is a deficient number, since it is larger than the sum of its proper divisors (44319763).

157279661 is a wasteful number, since it uses less digits than its factorization.

157279661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961 (or 2954 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The square root of 157279661 is about 12541.1188097394. The cubic root of 157279661 is about 539.7891964101.

The spelling of 157279661 in words is "one hundred fifty-seven million, two hundred seventy-nine thousand, six hundred sixty-one".