1954240396279 has 4 divisors (see below), whose sum is σ = 1987363114920. Its totient is φ = 1921117677640.

The previous prime is 1954240396261. The next prime is 1954240396307. The reversal of 1954240396279 is 9726930424591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1954240396279 - 2²³ = 1954232007671 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 (1954240390279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16561359232 + ... + 16561359349.

It is an arithmetic number, because the mean of its divisors is an integer number (496840778730).

Almost surely, 2^{1954240396279} is an apocalyptic number.

1954240396279 is a deficient number, since it is larger than the sum of its proper divisors (33122718641).

1954240396279 is an equidigital number, since it uses as much as digits as its factorization.

1954240396279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33122718640.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 1954240396279 in words is "one trillion, nine hundred fifty-four billion, two hundred forty million, three hundred ninety-six thousand, two hundred seventy-nine".