55486121390 has 32 divisors (see below), whose sum is σ = 115319623104. Its totient is φ = 18827688960.

The previous prime is 55486121389. The next prime is 55486121407. The reversal of 55486121390 is 9312168455.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4079081 + ... + 4092660.

It is an arithmetic number, because the mean of its divisors is an integer number (3603738222).

Almost surely, 2^55486121390 is an apocalyptic number.

55486121390 is an abundant number, since it is smaller than the sum of its proper divisors (59833501714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55486121390 is a wasteful number, since it uses less digits than its factorization.

55486121390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8171852.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 55486121390 in words is "fifty-five billion, four hundred eighty-six million, one hundred twenty-one thousand, three hundred ninety".