157781544 has 16 divisors (see below), whose sum is σ = 394453920. Its totient is φ = 52593840.

The previous prime is 157781531. The next prime is 157781549. The reversal of 157781544 is 445187751.

It is a junction number, because it is equal to n+sod(n) for n = 157781496 and 157781505.

It is not an unprimeable number, because it can be changed into a prime (157781549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3287092 + ... + 3287139.

It is an arithmetic number, because the mean of its divisors is an integer number (24653370).

Almost surely, 2^157781544 is an apocalyptic number.

It is an amenable number.

157781544 is an abundant number, since it is smaller than the sum of its proper divisors (236672376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157781544 is a wasteful number, since it uses less digits than its factorization.

157781544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6574240 (or 6574236 counting only the distinct ones).

The product of its digits is 156800, while the sum is 42.

The square root of 157781544 is about 12561.1123711238. The cubic root of 157781544 is about 540.3627466670.

The spelling of 157781544 in words is "one hundred fifty-seven million, seven hundred eighty-one thousand, five hundred forty-four".