55377639 has 6 divisors (see below), whose sum is σ = 79989936. Its totient is φ = 36918420.

The previous prime is 55377631. The next prime is 55377643. The reversal of 55377639 is 93677355.

55377639 is a `hidden beast` number, since 5 + 5 + 3 + 7 + 7 + 639 = 666.

It is not a de Polignac number, because 55377639 - 2³ = 55377631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55377594 and 55377603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55377631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3076527 + ... + 3076544.

It is an arithmetic number, because the mean of its divisors is an integer number (13331656).

Almost surely, 2^55377639 is an apocalyptic number.

55377639 is a deficient number, since it is larger than the sum of its proper divisors (24612297).

55377639 is a wasteful number, since it uses less digits than its factorization.

55377639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153077 (or 6153074 counting only the distinct ones).

The product of its digits is 595350, while the sum is 45.

The square root of 55377639 is about 7441.6153488339. The cubic root of 55377639 is about 381.1636513574.

The spelling of 55377639 in words is "fifty-five million, three hundred seventy-seven thousand, six hundred thirty-nine".