157238551447918 has 16 divisors (see below), whose sum is σ = 238378819339440. Its totient is φ = 77783243368896.

The previous prime is 157238551447871. The next prime is 157238551447979. The reversal of 157238551447918 is 819744155832751.

It is a super-2 number, since 2×157238551447918² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074518508 + ... + 1074664831.

It is an arithmetic number, because the mean of its divisors is an integer number (14898676208715).

Almost surely, 2^{157238551447918} is an apocalyptic number.

157238551447918 is a deficient number, since it is larger than the sum of its proper divisors (81140267891522).

157238551447918 is a wasteful number, since it uses less digits than its factorization.

157238551447918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149183731.

The product of its digits is 338688000, while the sum is 70.

The spelling of 157238551447918 in words is "one hundred fifty-seven trillion, two hundred thirty-eight billion, five hundred fifty-one million, four hundred forty-seven thousand, nine hundred eighteen".