2621494537 has 4 divisors (see below), whose sum is σ = 2775700116. Its totient is φ = 2467288960.

The previous prime is 2621494517. The next prime is 2621494627. The reversal of 2621494537 is 7354941262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 925619776 + 1695874761 = 30424^2 + 41181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621494537 - 2⁷ = 2621494409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2621494493 and 2621494502.

It is not an unprimeable number, because it can be changed into a prime (2621494507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77102764 + ... + 77102797.

It is an arithmetic number, because the mean of its divisors is an integer number (693925029).

Almost surely, 2^2621494537 is an apocalyptic number.

It is an amenable number.

2621494537 is a deficient number, since it is larger than the sum of its proper divisors (154205579).

2621494537 is a wasteful number, since it uses less digits than its factorization.

2621494537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154205578.

The product of its digits is 362880, while the sum is 43.

The square root of 2621494537 is about 51200.5325851206. The cubic root of 2621494537 is about 1378.8477634360.

The spelling of 2621494537 in words is "two billion, six hundred twenty-one million, four hundred ninety-four thousand, five hundred thirty-seven".