1599120981 has 16 divisors (see below), whose sum is σ = 2392528320. Its totient is φ = 1055523600.

The previous prime is 1599120953. The next prime is 1599120983. The reversal of 1599120981 is 1890219951.

It is not a de Polignac number, because 1599120981 - 2⁹ = 1599120469 is a prime.

It is a super-2 number, since 2×1599120981² = 5114375823748804722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1599120983) 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, 290475 + ... + 295928.

It is an arithmetic number, because the mean of its divisors is an integer number (149533020).

Almost surely, 2^1599120981 is an apocalyptic number.

It is an amenable number.

1599120981 is a deficient number, since it is larger than the sum of its proper divisors (793407339).

1599120981 is a wasteful number, since it uses less digits than its factorization.

1599120981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586513 (or 586507 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 45.

The square root of 1599120981 is about 39989.0107529556. The cubic root of 1599120981 is about 1169.3928671200.

The spelling of 1599120981 in words is "one billion, five hundred ninety-nine million, one hundred twenty thousand, nine hundred eighty-one".