55077373421 has 24 divisors (see below), whose sum is σ = 65152555416. Its totient is φ = 46411989120.

The previous prime is 55077373409. The next prime is 55077373447. The reversal of 55077373421 is 12437377055.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11927697796 + 43149675625 = 109214^2 + 207725^2 .

It is not a de Polignac number, because 55077373421 - 2⁶ = 55077373357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55077373921) 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, 8715755 + ... + 8722071.

It is an arithmetic number, because the mean of its divisors is an integer number (2714689809).

Almost surely, 2^55077373421 is an apocalyptic number.

It is an amenable number.

55077373421 is a deficient number, since it is larger than the sum of its proper divisors (10075181995).

55077373421 is a wasteful number, since it uses less digits than its factorization.

55077373421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9309 (or 9302 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 44.

The spelling of 55077373421 in words is "fifty-five billion, seventy-seven million, three hundred seventy-three thousand, four hundred twenty-one".