40678509915 has 48 divisors (see below), whose sum is σ = 72047102400. Its totient is φ = 21224436480.

The previous prime is 40678509877. The next prime is 40678509923. The reversal of 40678509915 is 51990587604.

40678509915 is a `hidden beast` number, since 40 + 6 + 7 + 8 + 509 + 91 + 5 = 666.

40678509915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40678509915 - 2⁷ = 40678509787 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 807930 + ... + 856800.

It is an arithmetic number, because the mean of its divisors is an integer number (1500981300).

Almost surely, 2^40678509915 is an apocalyptic number.

40678509915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40678509915 is a deficient number, since it is larger than the sum of its proper divisors (31368592485).

40678509915 is a wasteful number, since it uses less digits than its factorization.

40678509915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49284 (or 49281 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 40678509915 in words is "forty billion, six hundred seventy-eight million, five hundred nine thousand, nine hundred fifteen".