1551557042000 has 160 divisors (see below), whose sum is σ = 4298116093440. Its totient is φ = 530659814400.

The previous prime is 1551557041967. The next prime is 1551557042023. The reversal of 1551557042000 is 2407551551.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5590517 + ... + 5861483.

It is an arithmetic number, because the mean of its divisors is an integer number (26863225584).

Almost surely, 2^{1551557042000} is an apocalyptic number.

1551557042000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551557042000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149058046720).

1551557042000 is an abundant number, since it is smaller than the sum of its proper divisors (2746559051440).

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

1551557042000 is a wasteful number, since it uses less digits than its factorization.

1551557042000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271406 (or 271390 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 35.

The spelling of 1551557042000 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-seven million, forty-two thousand".