1555942080 has 672 divisors, whose sum is σ = 6538033152. Its totient is φ = 309657600.

The previous prime is 1555942061. The next prime is 1555942099. The reversal of 1555942080 is 802495551.

It is an interprime number because it is at equal distance from previous prime (1555942061) and next prime (1555942099).

It is a tau number, because it is divible by the number of its divisors (672).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16040592 + ... + 16040688.

It is an arithmetic number, because the mean of its divisors is an integer number (9729216).

Almost surely, 2^1555942080 is an apocalyptic number.

1555942080 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 1555942080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3269016576).

1555942080 is an abundant number, since it is smaller than the sum of its proper divisors (4982091072).

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

1555942080 is a wasteful number, since it uses less digits than its factorization.

1555942080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 1555942080 is about 39445.4316746566. The cubic root of 1555942080 is about 1158.7715095812.

The spelling of 1555942080 in words is "one billion, five hundred fifty-five million, nine hundred forty-two thousand, eighty".