2621608497 has 20 divisors (see below), whose sum is σ = 4051276020. Its totient is φ = 1687470624.

The previous prime is 2621608489. The next prime is 2621608499. The reversal of 2621608497 is 7948061262.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 534580641 + 2087027856 = 23121^2 + 45684^2 .

It is not a de Polignac number, because 2621608497 - 2³ = 2621608489 is a prime.

It is a super-2 number, since 2×2621608497² = 13745662223085198018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2621608499) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 555678 + ... + 560375.

It is an arithmetic number, because the mean of its divisors is an integer number (202563801).

Almost surely, 2^2621608497 is an apocalyptic number.

2621608497 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2621608497 is a deficient number, since it is larger than the sum of its proper divisors (1429667523).

2621608497 is a wasteful number, since it uses less digits than its factorization.

2621608497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116094 (or 1116085 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2621608497 is about 51201.6454520751. The cubic root of 2621608497 is about 1378.8677432874.

The spelling of 2621608497 in words is "two billion, six hundred twenty-one million, six hundred eight thousand, four hundred ninety-seven".