55981737 has 24 divisors (see below), whose sum is σ = 93986880. Its totient is φ = 31445280.

The previous prime is 55981721. The next prime is 55981759. The reversal of 55981737 is 73718955.

It is not a de Polignac number, because 55981737 - 2⁴ = 55981721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55981692 and 55981701.

It is not an unprimeable number, because it can be changed into a prime (55981787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3814 + ... + 11247.

It is an arithmetic number, because the mean of its divisors is an integer number (3916120).

Almost surely, 2^55981737 is an apocalyptic number.

It is an amenable number.

55981737 is a deficient number, since it is larger than the sum of its proper divisors (38005143).

55981737 is a wasteful number, since it uses less digits than its factorization.

55981737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15133 (or 15130 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 55981737 is about 7482.0944260280. The cubic root of 55981737 is about 382.5446417203.

The spelling of 55981737 in words is "fifty-five million, nine hundred eighty-one thousand, seven hundred thirty-seven".