1615672720351 has 2 divisors, whose sum is σ = 1615672720352. Its totient is φ = 1615672720350.

The previous prime is 1615672720349. The next prime is 1615672720367. The reversal of 1615672720351 is 1530272765161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1615672720351 - 2¹ = 1615672720349 is a prime.

It is a super-2 number, since 2×1615672720351² (a number of 25 digits) contains 22 as substring.

Together with 1615672720349, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1615672120351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807836360175 + 807836360176.

It is an arithmetic number, because the mean of its divisors is an integer number (807836360176).

Almost surely, 2^{1615672720351} is an apocalyptic number.

1615672720351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615672720351 is an equidigital number, since it uses as much as digits as its factorization.

1615672720351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 1615672720351 in words is "one trillion, six hundred fifteen billion, six hundred seventy-two million, seven hundred twenty thousand, three hundred fifty-one".