40107778515 has 48 divisors (see below), whose sum is σ = 79760910528. Its totient is φ = 18263605248.

The previous prime is 40107778489. The next prime is 40107778531. The reversal of 40107778515 is 51587770104.

It is not a de Polignac number, because 40107778515 - 2¹⁰ = 40107777491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166762 + ... + 328671.

It is an arithmetic number, because the mean of its divisors is an integer number (1661685636).

Almost surely, 2^40107778515 is an apocalyptic number.

40107778515 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40107778515 is a deficient number, since it is larger than the sum of its proper divisors (39653132013).

40107778515 is a wasteful number, since it uses less digits than its factorization.

40107778515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495708 (or 495705 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 45.

The spelling of 40107778515 in words is "forty billion, one hundred seven million, seven hundred seventy-eight thousand, five hundred fifteen".