55397437961 has 8 divisors (see below), whose sum is σ = 56909912640. Its totient is φ = 53885765808.

The previous prime is 55397437919. The next prime is 55397437969. The reversal of 55397437961 is 16973479355.

55397437961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55397437961 is a prime.

It is a super-2 number, since 2×55397437961² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55397437961.

It is not an unprimeable number, because it can be changed into a prime (55397437969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59351 + ... + 338108.

It is an arithmetic number, because the mean of its divisors is an integer number (7113739080).

Almost surely, 2^55397437961 is an apocalyptic number.

It is an amenable number.

55397437961 is a deficient number, since it is larger than the sum of its proper divisors (1512474679).

55397437961 is a wasteful number, since it uses less digits than its factorization.

55397437961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401263.

The product of its digits is 21432600, while the sum is 59.

The spelling of 55397437961 in words is "fifty-five billion, three hundred ninety-seven million, four hundred thirty-seven thousand, nine hundred sixty-one".