26139720739 has 16 divisors (see below), whose sum is σ = 28970173440. Its totient is φ = 23387137800.

The previous prime is 26139720713. The next prime is 26139720773. The reversal of 26139720739 is 93702793162.

It is not a de Polignac number, because 26139720739 - 2²³ = 26131332131 is a prime.

It is a super-2 number, since 2×26139720739² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26139720692 and 26139720701.

It is not an unprimeable number, because it can be changed into a prime (26139720799) 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, 84050394 + ... + 84050704.

It is an arithmetic number, because the mean of its divisors is an integer number (1810635840).

Almost surely, 2^26139720739 is an apocalyptic number.

26139720739 is a deficient number, since it is larger than the sum of its proper divisors (2830452701).

26139720739 is an frugal number, since it uses more digits than its factorization.

26139720739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 26139720739 in words is "twenty-six billion, one hundred thirty-nine million, seven hundred twenty thousand, seven hundred thirty-nine".