1555105401012 has 48 divisors (see below), whose sum is σ = 3765260201472. Its totient is φ = 499182200160.

The previous prime is 1555105400993. The next prime is 1555105401013. The reversal of 1555105401012 is 2101045015551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555105401013) 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, 21187098 + ... + 21260369.

It is an arithmetic number, because the mean of its divisors is an integer number (78442920864).

Almost surely, 2^{1555105401012} is an apocalyptic number.

1555105401012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1555105401012 is an abundant number, since it is smaller than the sum of its proper divisors (2210154800460).

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

1555105401012 is a wasteful number, since it uses less digits than its factorization.

1555105401012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42447588 (or 42447586 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 1555105401012 in words is "one trillion, five hundred fifty-five billion, one hundred five million, four hundred one thousand, twelve".