555551387772 has 48 divisors (see below), whose sum is σ = 1352707625472. Its totient is φ = 177124368960.

The previous prime is 555551387767. The next prime is 555551387777. The reversal of 555551387772 is 277783155555.

It is an interprime number because it is at equal distance from previous prime (555551387767) and next prime (555551387777).

It is a super-2 number, since 2×555551387772² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555551387777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10906122 + ... + 10956942.

It is an arithmetic number, because the mean of its divisors is an integer number (28181408864).

Almost surely, 2^555551387772 is an apocalyptic number.

It is an amenable number.

555551387772 is an abundant number, since it is smaller than the sum of its proper divisors (797156237700).

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

555551387772 is a wasteful number, since it uses less digits than its factorization.

555551387772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90458 (or 90456 counting only the distinct ones).

The product of its digits is 51450000, while the sum is 60.

The spelling of 555551387772 in words is "five hundred fifty-five billion, five hundred fifty-one million, three hundred eighty-seven thousand, seven hundred seventy-two".