2621693121451 has 2 divisors, whose sum is σ = 2621693121452. Its totient is φ = 2621693121450.

The previous prime is 2621693121431. The next prime is 2621693121461. The reversal of 2621693121451 is 1541213961262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621693121451 - 2²⁵ = 2621659567019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2621693121398 and 2621693121407.

It is not a weakly prime, because it can be changed into another prime (2621693121431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310846560725 + 1310846560726.

It is an arithmetic number, because the mean of its divisors is an integer number (1310846560726).

Almost surely, 2^{2621693121451} is an apocalyptic number.

2621693121451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621693121451 is an equidigital number, since it uses as much as digits as its factorization.

2621693121451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The spelling of 2621693121451 in words is "two trillion, six hundred twenty-one billion, six hundred ninety-three million, one hundred twenty-one thousand, four hundred fifty-one".