11621510401 has 2 divisors, whose sum is σ = 11621510402. Its totient is φ = 11621510400.

The previous prime is 11621510333. The next prime is 11621510443. The reversal of 11621510401 is 10401512611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7259040000 + 4362470401 = 85200^2 + 66049^2 .

It is a cyclic number.

It is not a de Polignac number, because 11621510401 - 2¹⁵ = 11621477633 is a prime.

It is not a weakly prime, because it can be changed into another prime (11621510491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810755200 + 5810755201.

It is an arithmetic number, because the mean of its divisors is an integer number (5810755201).

Almost surely, 2^11621510401 is an apocalyptic number.

It is an amenable number.

11621510401 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621510401 is an equidigital number, since it uses as much as digits as its factorization.

11621510401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

The spelling of 11621510401 in words is "eleven billion, six hundred twenty-one million, five hundred ten thousand, four hundred one".