616261515451 has 2 divisors, whose sum is σ = 616261515452. Its totient is φ = 616261515450.

The previous prime is 616261515449. The next prime is 616261515473. The reversal of 616261515451 is 154515162616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616261515451 - 2¹ = 616261515449 is a prime.

It is a super-2 number, since 2×616261515451² (a number of 24 digits) contains 22 as substring.

Together with 616261515449, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 616261515398 and 616261515407.

It is not a weakly prime, because it can be changed into another prime (616261515431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308130757725 + 308130757726.

It is an arithmetic number, because the mean of its divisors is an integer number (308130757726).

Almost surely, 2^616261515451 is an apocalyptic number.

616261515451 is a deficient number, since it is larger than the sum of its proper divisors (1).

616261515451 is an equidigital number, since it uses as much as digits as its factorization.

616261515451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216000, while the sum is 43.

The spelling of 616261515451 in words is "six hundred sixteen billion, two hundred sixty-one million, five hundred fifteen thousand, four hundred fifty-one".