155400222820 has 48 divisors (see below), whose sum is σ = 326898411840. Its totient is φ = 62053923456.

The previous prime is 155400222799. The next prime is 155400222839. The reversal of 155400222820 is 28222004551.

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, 38818939 + ... + 38822941.

It is an arithmetic number, because the mean of its divisors is an integer number (6810383580).

Almost surely, 2^155400222820 is an apocalyptic number.

155400222820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155400222820 is an abundant number, since it is smaller than the sum of its proper divisors (171498189020).

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

155400222820 is a wasteful number, since it uses less digits than its factorization.

155400222820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844 (or 6842 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The spelling of 155400222820 in words is "one hundred fifty-five billion, four hundred million, two hundred twenty-two thousand, eight hundred twenty".