1597156099 has 16 divisors (see below), whose sum is σ = 1992162816. Its totient is φ = 1243972800.

The previous prime is 1597156049. The next prime is 1597156109. The reversal of 1597156099 is 9906517951.

It is not a de Polignac number, because 1597156099 - 2⁷ = 1597155971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1597156039) 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, 268639 + ... + 274519.

It is an arithmetic number, because the mean of its divisors is an integer number (124510176).

Almost surely, 2^1597156099 is an apocalyptic number.

1597156099 is a deficient number, since it is larger than the sum of its proper divisors (395006717).

1597156099 is a wasteful number, since it uses less digits than its factorization.

1597156099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426.

The product of its (nonzero) digits is 765450, while the sum is 52.

The square root of 1597156099 is about 39964.4354270144. The cubic root of 1597156099 is about 1168.9137162291.

The spelling of 1597156099 in words is "one billion, five hundred ninety-seven million, one hundred fifty-six thousand, ninety-nine".