55740961 has 4 divisors (see below), whose sum is σ = 55756800. Its totient is φ = 55725124.

The previous prime is 55740917. The next prime is 55740973. The reversal of 55740961 is 16904755.

55740961 is a nontrivial binomial coefficient, being equal to C(10559, 2).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55740961 - 2¹⁷ = 55609889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55740961.

It is not an unprimeable number, because it can be changed into a prime (55720961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 10558.

It is an arithmetic number, because the mean of its divisors is an integer number (13939200).

Almost surely, 2^55740961 is an apocalyptic number.

55740961 is the 10558-th triangular number.

55740961 is the 3520-th centered nonagonal number.

It is an amenable number.

55740961 is a deficient number, since it is larger than the sum of its proper divisors (15839).

55740961 is a wasteful number, since it uses less digits than its factorization.

55740961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15838.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55740961 is about 7465.9869407869. The cubic root of 55740961 is about 381.9954153667.

It can be divided in two parts, 5 and 5740961, that added together give a triangular number (5740966 = T₃₃₈₈).

The spelling of 55740961 in words is "fifty-five million, seven hundred forty thousand, nine hundred sixty-one".