15677223749 has 4 divisors (see below), whose sum is σ = 17102425920. Its totient is φ = 14252021580.

The previous prime is 15677223733. The next prime is 15677223797. The reversal of 15677223749 is 94732277651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94732277651 = 11 ⋅8612025241.

It is a cyclic number.

It is not a de Polignac number, because 15677223749 - 2⁴ = 15677223733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15677223749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15677223349) 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, 712601069 + ... + 712601090.

It is an arithmetic number, because the mean of its divisors is an integer number (4275606480).

Almost surely, 2^15677223749 is an apocalyptic number.

It is an amenable number.

15677223749 is a deficient number, since it is larger than the sum of its proper divisors (1425202171).

15677223749 is a wasteful number, since it uses less digits than its factorization.

15677223749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425202170.

The product of its digits is 4445280, while the sum is 53.

The spelling of 15677223749 in words is "fifteen billion, six hundred seventy-seven million, two hundred twenty-three thousand, seven hundred forty-nine".