1621479796 has 24 divisors (see below), whose sum is σ = 2923647944. Its totient is φ = 786516480.

The previous prime is 1621479791. The next prime is 1621479799. The reversal of 1621479796 is 6979741261.

It can be written as a sum of positive squares in 4 ways, for example, as 120692196 + 1500787600 = 10986^2 + 38740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621479791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27705 + ... + 63328.

Almost surely, 2^1621479796 is an apocalyptic number.

It is an amenable number.

1621479796 is a deficient number, since it is larger than the sum of its proper divisors (1302168148).

1621479796 is a wasteful number, since it uses less digits than its factorization.

1621479796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91171 (or 91169 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 52.

The square root of 1621479796 is about 40267.6023125291. The cubic root of 1621479796 is about 1174.8177887968.

The spelling of 1621479796 in words is "one billion, six hundred twenty-one million, four hundred seventy-nine thousand, seven hundred ninety-six".