40479125749 has 2 divisors, whose sum is σ = 40479125750. Its totient is φ = 40479125748.

The previous prime is 40479125677. The next prime is 40479125759. The reversal of 40479125749 is 94752197404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22482903249 + 17996222500 = 149943^2 + 134150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40479125749 - 2¹⁹ = 40478601461 is a prime.

It is a super-2 number, since 2×40479125749² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40479125696 and 40479125705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40479125759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20239562874 + 20239562875.

It is an arithmetic number, because the mean of its divisors is an integer number (20239562875).

Almost surely, 2^40479125749 is an apocalyptic number.

It is an amenable number.

40479125749 is a deficient number, since it is larger than the sum of its proper divisors (1).

40479125749 is an equidigital number, since it uses as much as digits as its factorization.

40479125749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 40479125749 in words is "forty billion, four hundred seventy-nine million, one hundred twenty-five thousand, seven hundred forty-nine".