111557950457 has 2 divisors, whose sum is σ = 111557950458. Its totient is φ = 111557950456.

The previous prime is 111557950451. The next prime is 111557950487. The reversal of 111557950457 is 754059755111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95817487936 + 15740462521 = 309544^2 + 125461^2 .

It is a cyclic number.

It is not a de Polignac number, because 111557950457 - 2²⁴ = 111541173241 is a prime.

It is not a weakly prime, because it can be changed into another prime (111557950451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55778975228 + 55778975229.

It is an arithmetic number, because the mean of its divisors is an integer number (55778975229).

Almost surely, 2^111557950457 is an apocalyptic number.

It is an amenable number.

111557950457 is a deficient number, since it is larger than the sum of its proper divisors (1).

111557950457 is an equidigital number, since it uses as much as digits as its factorization.

111557950457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102500, while the sum is 50.

The spelling of 111557950457 in words is "one hundred eleven billion, five hundred fifty-seven million, nine hundred fifty thousand, four hundred fifty-seven".