1273978522949 has 24 divisors (see below), whose sum is σ = 1455739532352. Its totient is φ = 1105602470720.

The previous prime is 1273978522919. The next prime is 1273978522951. The reversal of 1273978522949 is 9492258793721.

It is a de Polignac number, because none of the positive numbers 2^k-1273978522949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273978522919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2709329 + ... + 3144585.

It is an arithmetic number, because the mean of its divisors is an integer number (60655813848).

Almost surely, 2^{1273978522949} is an apocalyptic number.

It is an amenable number.

1273978522949 is a deficient number, since it is larger than the sum of its proper divisors (181761009403).

1273978522949 is a wasteful number, since it uses less digits than its factorization.

1273978522949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435817 (or 435794 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 68.

The spelling of 1273978522949 in words is "one trillion, two hundred seventy-three billion, nine hundred seventy-eight million, five hundred twenty-two thousand, nine hundred forty-nine".