157277745 has 24 divisors (see below), whose sum is σ = 278418816. Its totient is φ = 82095648.

The previous prime is 157277741. The next prime is 157277767. The reversal of 157277745 is 547772751.

157277745 is a `hidden beast` number, since 1 + 572 + 7 + 7 + 74 + 5 = 666.

It is not a de Polignac number, because 157277745 - 2² = 157277741 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 157277745.

It is not an unprimeable number, because it can be changed into a prime (157277741) 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 23 ways as a sum of consecutive naturals, for example, 35067 + ... + 39296.

It is an arithmetic number, because the mean of its divisors is an integer number (11600784).

Almost surely, 2^157277745 is an apocalyptic number.

157277745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157277745 is a deficient number, since it is larger than the sum of its proper divisors (121141071).

157277745 is a wasteful number, since it uses less digits than its factorization.

157277745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74421 (or 74418 counting only the distinct ones).

The product of its digits is 480200, while the sum is 45.

The square root of 157277745 is about 12541.0424207878. The cubic root of 157277745 is about 539.7870044753.

The spelling of 157277745 in words is "one hundred fifty-seven million, two hundred seventy-seven thousand, seven hundred forty-five".