400692779401 has 2 divisors, whose sum is σ = 400692779402. Its totient is φ = 400692779400.

The previous prime is 400692779317. The next prime is 400692779411. The reversal of 400692779401 is 104977296004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374690894400 + 26001885001 = 612120^2 + 161251^2 .

It is a cyclic number.

It is not a de Polignac number, because 400692779401 - 2¹⁵ = 400692746633 is a prime.

It is not a weakly prime, because it can be changed into another prime (400692779411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200346389700 + 200346389701.

It is an arithmetic number, because the mean of its divisors is an integer number (200346389701).

Almost surely, 2^400692779401 is an apocalyptic number.

It is an amenable number.

400692779401 is a deficient number, since it is larger than the sum of its proper divisors (1).

400692779401 is an equidigital number, since it uses as much as digits as its factorization.

400692779401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 400692779401 in words is "four hundred billion, six hundred ninety-two million, seven hundred seventy-nine thousand, four hundred one".