1400266620261 has 6 divisors (see below), whose sum is σ = 2022607340390. Its totient is φ = 933511080168.

The previous prime is 1400266620253. The next prime is 1400266620281. The reversal of 1400266620261 is 1620266620041.

It can be written as a sum of positive squares in only one way, i.e., 926242632225 + 474023988036 = 962415^2 + 688494^2 .

It is not a de Polignac number, because 1400266620261 - 2³ = 1400266620253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400266620281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77792590006 + ... + 77792590023.

Almost surely, 2^{1400266620261} is an apocalyptic number.

It is an amenable number.

1400266620261 is a deficient number, since it is larger than the sum of its proper divisors (622340720129).

1400266620261 is a wasteful number, since it uses less digits than its factorization.

1400266620261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155585180035 (or 155585180032 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 1400266620261 in words is "one trillion, four hundred billion, two hundred sixty-six million, six hundred twenty thousand, two hundred sixty-one".