749440697887 has 16 divisors (see below), whose sum is σ = 897645795840. Its totient is φ = 611765063712.

The previous prime is 749440697881. The next prime is 749440697893. The reversal of 749440697887 is 788796044947.

It is an interprime number because it is at equal distance from previous prime (749440697881) and next prime (749440697893).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749440697887 is a prime.

It is a super-2 number, since 2×749440697887² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749440697881) 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, 10126693 + ... + 10200430.

It is an arithmetic number, because the mean of its divisors is an integer number (56102862240).

Almost surely, 2^749440697887 is an apocalyptic number.

749440697887 is a deficient number, since it is larger than the sum of its proper divisors (148205097953).

749440697887 is a wasteful number, since it uses less digits than its factorization.

749440697887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20327382.

The product of its (nonzero) digits is 682795008, while the sum is 73.

The spelling of 749440697887 in words is "seven hundred forty-nine billion, four hundred forty million, six hundred ninety-seven thousand, eight hundred eighty-seven".