15746399997 has 16 divisors (see below), whose sum is σ = 21676853760. Its totient is φ = 10156910400.

The previous prime is 15746399993. The next prime is 15746400053. The reversal of 15746399997 is 79999364751.

It is not a de Polignac number, because 15746399997 - 2² = 15746399993 is a prime.

It is a super-2 number, since 2×15746399997² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15746399993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 542079 + ... + 570387.

It is an arithmetic number, because the mean of its divisors is an integer number (1354803360).

Almost surely, 2^15746399997 is an apocalyptic number.

It is an amenable number.

15746399997 is a deficient number, since it is larger than the sum of its proper divisors (5930453763).

15746399997 is a wasteful number, since it uses less digits than its factorization.

15746399997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34324.

The product of its digits is 115736040, while the sum is 69.

The spelling of 15746399997 in words is "fifteen billion, seven hundred forty-six million, three hundred ninety-nine thousand, nine hundred ninety-seven".