53439990961 has 16 divisors (see below), whose sum is σ = 63257437440. Its totient is φ = 44172192960.

The previous prime is 53439990949. The next prime is 53439990971. The reversal of 53439990961 is 16909993435.

It is not a de Polignac number, because 53439990961 - 2⁹ = 53439990449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53439990896 and 53439990905.

It is not an unprimeable number, because it can be changed into a prime (53439990911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6340 + ... + 326986.

It is an arithmetic number, because the mean of its divisors is an integer number (3953589840).

Almost surely, 2^53439990961 is an apocalyptic number.

It is an amenable number.

53439990961 is a deficient number, since it is larger than the sum of its proper divisors (9817446479).

53439990961 is a wasteful number, since it uses less digits than its factorization.

53439990961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321504.

The product of its (nonzero) digits is 7085880, while the sum is 58.

The spelling of 53439990961 in words is "fifty-three billion, four hundred thirty-nine million, nine hundred ninety thousand, nine hundred sixty-one".