55515423451387 has 2 divisors, whose sum is σ = 55515423451388. Its totient is φ = 55515423451386.

The previous prime is 55515423451351. The next prime is 55515423451471. The reversal of 55515423451387 is 78315432451555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55515423451387 - 2⁷ = 55515423451259 is a prime.

It is not a weakly prime, because it can be changed into another prime (55515423451337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27757711725693 + 27757711725694.

It is an arithmetic number, because the mean of its divisors is an integer number (27757711725694).

Almost surely, 2^{55515423451387} is an apocalyptic number.

55515423451387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55515423451387 is an equidigital number, since it uses as much as digits as its factorization.

55515423451387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400000, while the sum is 58.

The spelling of 55515423451387 in words is "fifty-five trillion, five hundred fifteen billion, four hundred twenty-three million, four hundred fifty-one thousand, three hundred eighty-seven".