55078000997 has 4 divisors (see below), whose sum is σ = 55080812736. Its totient is φ = 55075189260.

The previous prime is 55078000981. The next prime is 55078001009. The reversal of 55078000997 is 79900087055.

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 a cyclic number.

It is not a de Polignac number, because 55078000997 - 2⁴ = 55078000981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55078000897) 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, 1376279 + ... + 1415732.

It is an arithmetic number, because the mean of its divisors is an integer number (13770203184).

Almost surely, 2^55078000997 is an apocalyptic number.

It is an amenable number.

55078000997 is a deficient number, since it is larger than the sum of its proper divisors (2811739).

55078000997 is a wasteful number, since it uses less digits than its factorization.

55078000997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811738.

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 55078000997 in words is "fifty-five billion, seventy-eight million, nine hundred ninety-seven", and thus it is an aban number.