2613645621602 has 4 divisors (see below), whose sum is σ = 3920468432406. Its totient is φ = 1306822810800.

The previous prime is 2613645621571. The next prime is 2613645621689. The reversal of 2613645621602 is 2061265463162.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 2001825989881 + 611819631721 = 1414859^2 + 782189^2 .

It is a super-2 number, since 2×2613645621602² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653411405399 + ... + 653411405402.

Almost surely, 2^{2613645621602} is an apocalyptic number.

2613645621602 is a deficient number, since it is larger than the sum of its proper divisors (1306822810804).

2613645621602 is a wasteful number, since it uses less digits than its factorization.

2613645621602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306822810803.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 2613645621602 in words is "two trillion, six hundred thirteen billion, six hundred forty-five million, six hundred twenty-one thousand, six hundred two".