2154631274657 has 2 divisors, whose sum is σ = 2154631274658. Its totient is φ = 2154631274656.

The previous prime is 2154631274603. The next prime is 2154631274671. The reversal of 2154631274657 is 7564721364512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1284722503936 + 869908770721 = 1133456^2 + 932689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154631274657 - 2¹⁰ = 2154631273633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2154631274599 and 2154631274608.

It is not a weakly prime, because it can be changed into another prime (2154631273657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077315637328 + 1077315637329.

It is an arithmetic number, because the mean of its divisors is an integer number (1077315637329).

Almost surely, 2^{2154631274657} is an apocalyptic number.

It is an amenable number.

2154631274657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154631274657 is an equidigital number, since it uses as much as digits as its factorization.

2154631274657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8467200, while the sum is 53.

The spelling of 2154631274657 in words is "two trillion, one hundred fifty-four billion, six hundred thirty-one million, two hundred seventy-four thousand, six hundred fifty-seven".