1597961780 has 12 divisors (see below), whose sum is σ = 3355719780. Its totient is φ = 639184704.

The previous prime is 1597961779. The next prime is 1597961797. The reversal of 1597961780 is 871697951.

It can be written as a sum of positive squares in 2 ways, for example, as 936237604 + 661724176 = 30598^2 + 25724^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39949025 + ... + 39949064.

It is an arithmetic number, because the mean of its divisors is an integer number (279643315).

Almost surely, 2^1597961780 is an apocalyptic number.

1597961780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1597961780 is an abundant number, since it is smaller than the sum of its proper divisors (1757758000).

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

1597961780 is a wasteful number, since it uses less digits than its factorization.

1597961780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79898098 (or 79898096 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 53.

The square root of 1597961780 is about 39974.5141308809. The cubic root of 1597961780 is about 1169.1102349578.

The spelling of 1597961780 in words is "one billion, five hundred ninety-seven million, nine hundred sixty-one thousand, seven hundred eighty".