15749999001 has 27 divisors (see below), whose sum is σ = 25012773877. Its totient is φ = 9542943960.

The previous prime is 15749998991. The next prime is 15749999011. The reversal of 15749999001 is 10099994751.

The square root of 15749999001 is 125499.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (15749998991) and next prime (15749999011).

It is not a de Polignac number, because 15749999001 - 2¹⁷ = 15749867929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15749999011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4139566 + ... + 4143368.

Almost surely, 2^15749999001 is an apocalyptic number.

15749999001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15749999001 is the 125499-th square number.

15749999001 is the 62750-th centered octagonal number.

It is an amenable number.

15749999001 is a deficient number, since it is larger than the sum of its proper divisors (9262774876).

15749999001 is an frugal number, since it uses more digits than its factorization.

15749999001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 54.

The spelling of 15749999001 in words is "fifteen billion, seven hundred forty-nine million, nine hundred ninety-nine thousand, one".