1655238455957 has 2 divisors, whose sum is σ = 1655238455958. Its totient is φ = 1655238455956.

The previous prime is 1655238455933. The next prime is 1655238455971. The reversal of 1655238455957 is 7595548325561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1518437598001 + 136800857956 = 1232249^2 + 369866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655238455957 - 2²⁴ = 1655221678741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1655238455893 and 1655238455902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655238458957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827619227978 + 827619227979.

It is an arithmetic number, because the mean of its divisors is an integer number (827619227979).

Almost surely, 2^{1655238455957} is an apocalyptic number.

It is an amenable number.

1655238455957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655238455957 is an equidigital number, since it uses as much as digits as its factorization.

1655238455957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800000, while the sum is 65.

The spelling of 1655238455957 in words is "one trillion, six hundred fifty-five billion, two hundred thirty-eight million, four hundred fifty-five thousand, nine hundred fifty-seven".