15494666651 has 4 divisors (see below), whose sum is σ = 15495355152. Its totient is φ = 15493978152.

The previous prime is 15494666617. The next prime is 15494666723. The reversal of 15494666651 is 15666649451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15666649451 = 2297 ⋅6820483.

It is a cyclic number.

It is not a de Polignac number, because 15494666651 - 2⁶ = 15494666587 is a prime.

It is a super-2 number, since 2×15494666651² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15494666593 and 15494666602.

It is not an unprimeable number, because it can be changed into a prime (15494666251) 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, 309311 + ... + 355896.

It is an arithmetic number, because the mean of its divisors is an integer number (3873838788).

Almost surely, 2^15494666651 is an apocalyptic number.

15494666651 is a deficient number, since it is larger than the sum of its proper divisors (688501).

15494666651 is an equidigital number, since it uses as much as digits as its factorization.

15494666651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688500.

The product of its digits is 4665600, while the sum is 53.

The spelling of 15494666651 in words is "fifteen billion, four hundred ninety-four million, six hundred sixty-six thousand, six hundred fifty-one".