1615256563351 has 4 divisors (see below), whose sum is σ = 1615415853304. Its totient is φ = 1615097273400.

The previous prime is 1615256563339. The next prime is 1615256563357. The reversal of 1615256563351 is 1533656525161.

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

It is a cyclic number.

It is not a de Polignac number, because 1615256563351 - 2⁷ = 1615256563223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1615256563295 and 1615256563304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1615256563357) 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, 79629765 + ... + 79650046.

It is an arithmetic number, because the mean of its divisors is an integer number (403853963326).

Almost surely, 2^{1615256563351} is an apocalyptic number.

1615256563351 is a deficient number, since it is larger than the sum of its proper divisors (159289953).

1615256563351 is a wasteful number, since it uses less digits than its factorization.

1615256563351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159289952.

The product of its digits is 2430000, while the sum is 49.

The spelling of 1615256563351 in words is "one trillion, six hundred fifteen billion, two hundred fifty-six million, five hundred sixty-three thousand, three hundred fifty-one".