1274756749491 has 16 divisors (see below), whose sum is σ = 1727818439328. Its totient is φ = 835770950400.

The previous prime is 1274756749471. The next prime is 1274756749493. The reversal of 1274756749491 is 1949476574721.

It is not a de Polignac number, because 1274756749491 - 2²⁵ = 1274723195059 is a prime.

It is a super-3 number, since 3×1274756749491³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1274756749493) 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, 578575 + ... + 1698311.

It is an arithmetic number, because the mean of its divisors is an integer number (107988652458).

Almost surely, 2^{1274756749491} is an apocalyptic number.

1274756749491 is a deficient number, since it is larger than the sum of its proper divisors (453061689837).

1274756749491 is a wasteful number, since it uses less digits than its factorization.

1274756749491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126022.

The product of its digits is 106686720, while the sum is 66.

The spelling of 1274756749491 in words is "one trillion, two hundred seventy-four billion, seven hundred fifty-six million, seven hundred forty-nine thousand, four hundred ninety-one".