2491167777427 has 12 divisors (see below), whose sum is σ = 2898983980560. Its totient is φ = 2134479873456.

The previous prime is 2491167777407. The next prime is 2491167777433. The reversal of 2491167777427 is 7247777611942.

It is a happy number.

It is not a de Polignac number, because 2491167777427 - 2²³ = 2491159388819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491167777407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9473652 + ... + 9733057.

It is an arithmetic number, because the mean of its divisors is an integer number (241581998380).

Almost surely, 2^{2491167777427} is an apocalyptic number.

2491167777427 is a deficient number, since it is larger than the sum of its proper divisors (407816203133).

2491167777427 is a wasteful number, since it uses less digits than its factorization.

2491167777427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19209370 (or 19209363 counting only the distinct ones).

The product of its digits is 58084992, while the sum is 64.

The spelling of 2491167777427 in words is "two trillion, four hundred ninety-one billion, one hundred sixty-seven million, seven hundred seventy-seven thousand, four hundred twenty-seven".