157781012 has 48 divisors (see below), whose sum is σ = 309173760. Its totient is φ = 70067712.

The previous prime is 157781009. The next prime is 157781051. The reversal of 157781012 is 210187751.

It is a self number, because there is not a number n which added to its sum of digits gives 157781012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122918 + ... + 124194.

It is an arithmetic number, because the mean of its divisors is an integer number (6441120).

Almost surely, 2^157781012 is an apocalyptic number.

It is an amenable number.

157781012 is a deficient number, since it is larger than the sum of its proper divisors (151392748).

157781012 is a wasteful number, since it uses less digits than its factorization.

157781012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 157781012 is about 12561.0911946375. The cubic root of 157781012 is about 540.3621393436.

The spelling of 157781012 in words is "one hundred fifty-seven million, seven hundred eighty-one thousand, twelve".