26693742990 has 16 divisors (see below), whose sum is σ = 64064983248. Its totient is φ = 7118331456.

The previous prime is 26693742989. The next prime is 26693742991. The reversal of 26693742990 is 9924739662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26693742989) and next prime (26693742991).

It is a self number, because there is not a number n which added to its sum of digits gives 26693742990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26693742991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444895687 + ... + 444895746.

It is an arithmetic number, because the mean of its divisors is an integer number (4004061453).

Almost surely, 2^26693742990 is an apocalyptic number.

26693742990 is an abundant number, since it is smaller than the sum of its proper divisors (37371240258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26693742990 is a wasteful number, since it uses less digits than its factorization.

26693742990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889791443.

The product of its (nonzero) digits is 8817984, while the sum is 57.

The spelling of 26693742990 in words is "twenty-six billion, six hundred ninety-three million, seven hundred forty-two thousand, nine hundred ninety".