44001649961 has 2 divisors, whose sum is σ = 44001649962. Its totient is φ = 44001649960.

The previous prime is 44001649889. The next prime is 44001650047. The reversal of 44001649961 is 16994610044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42940128400 + 1061521561 = 207220^2 + 32581^2 .

It is a cyclic number.

It is not a de Polignac number, because 44001649961 - 2¹⁰ = 44001648937 is a prime.

It is a super-2 number, since 2×44001649961² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44001649061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22000824980 + 22000824981.

It is an arithmetic number, because the mean of its divisors is an integer number (22000824981).

Almost surely, 2^44001649961 is an apocalyptic number.

It is an amenable number.

44001649961 is a deficient number, since it is larger than the sum of its proper divisors (1).

44001649961 is an equidigital number, since it uses as much as digits as its factorization.

44001649961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 44001649961 in words is "forty-four billion, one million, six hundred forty-nine thousand, nine hundred sixty-one".