1956497801 has 2 divisors, whose sum is σ = 1956497802. Its totient is φ = 1956497800.

The previous prime is 1956497687. The next prime is 1956497821. The reversal of 1956497801 is 1087946591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193633401 + 762864400 = 34549^2 + 27620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1956497801 - 2²² = 1952303497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1956497801.

It is not a weakly prime, because it can be changed into another prime (1956497821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978248900 + 978248901.

It is an arithmetic number, because the mean of its divisors is an integer number (978248901).

Almost surely, 2^1956497801 is an apocalyptic number.

It is an amenable number.

1956497801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956497801 is an equidigital number, since it uses as much as digits as its factorization.

1956497801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 1956497801 is about 44232.3162518085. The cubic root of 1956497801 is about 1250.7191170971.

The spelling of 1956497801 in words is "one billion, nine hundred fifty-six million, four hundred ninety-seven thousand, eight hundred one".