55420440425 has 48 divisors (see below), whose sum is σ = 78963696000. Its totient is φ = 37797580800.

The previous prime is 55420440391. The next prime is 55420440431. The reversal of 55420440425 is 52404402455.

It is not a de Polignac number, because 55420440425 - 2¹² = 55420436329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29778995 + ... + 29780855.

It is an arithmetic number, because the mean of its divisors is an integer number (1645077000).

Almost surely, 2^55420440425 is an apocalyptic number.

It is an amenable number.

55420440425 is a deficient number, since it is larger than the sum of its proper divisors (23543255575).

55420440425 is a wasteful number, since it uses less digits than its factorization.

55420440425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706 (or 2701 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

The spelling of 55420440425 in words is "fifty-five billion, four hundred twenty million, four hundred forty thousand, four hundred twenty-five".