3956557605127 has 2 divisors, whose sum is σ = 3956557605128. Its totient is φ = 3956557605126.

The previous prime is 3956557605113. The next prime is 3956557605131. The reversal of 3956557605127 is 7215067556593.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3956557605127 is a prime.

It is a super-2 number, since 2×3956557605127² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956557605167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978278802563 + 1978278802564.

It is an arithmetic number, because the mean of its divisors is an integer number (1978278802564).

Almost surely, 2^{3956557605127} is an apocalyptic number.

3956557605127 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956557605127 is an equidigital number, since it uses as much as digits as its factorization.

3956557605127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 59535000, while the sum is 61.

The spelling of 3956557605127 in words is "three trillion, nine hundred fifty-six billion, five hundred fifty-seven million, six hundred five thousand, one hundred twenty-seven".