157772661047 has 2 divisors, whose sum is σ = 157772661048. Its totient is φ = 157772661046.

The previous prime is 157772661043. The next prime is 157772661097. The reversal of 157772661047 is 740166277751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157772661047 - 2² = 157772661043 is a prime.

It is a super-2 number, since 2×157772661047² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 157772661047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157772661043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78886330523 + 78886330524.

It is an arithmetic number, because the mean of its divisors is an integer number (78886330524).

Almost surely, 2^157772661047 is an apocalyptic number.

157772661047 is a deficient number, since it is larger than the sum of its proper divisors (1).

157772661047 is an equidigital number, since it uses as much as digits as its factorization.

157772661047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3457440, while the sum is 53.

The spelling of 157772661047 in words is "one hundred fifty-seven billion, seven hundred seventy-two million, six hundred sixty-one thousand, forty-seven".