111401551957 has 2 divisors, whose sum is σ = 111401551958. Its totient is φ = 111401551956.

The previous prime is 111401551927. The next prime is 111401551969. The reversal of 111401551957 is 759155104111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92249483076 + 19152068881 = 303726^2 + 138391^2 .

It is a cyclic number.

It is not a de Polignac number, because 111401551957 - 2²⁷ = 111267334229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111401551907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55700775978 + 55700775979.

It is an arithmetic number, because the mean of its divisors is an integer number (55700775979).

Almost surely, 2^111401551957 is an apocalyptic number.

It is an amenable number.

111401551957 is a deficient number, since it is larger than the sum of its proper divisors (1).

111401551957 is an equidigital number, since it uses as much as digits as its factorization.

111401551957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 40.

The spelling of 111401551957 in words is "one hundred eleven billion, four hundred one million, five hundred fifty-one thousand, nine hundred fifty-seven".