40378657015 has 4 divisors (see below), whose sum is σ = 48454388424. Its totient is φ = 32302925608.

The previous prime is 40378656991. The next prime is 40378657021. The reversal of 40378657015 is 51075687304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40378657015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4037865697 + ... + 4037865706.

It is an arithmetic number, because the mean of its divisors is an integer number (12113597106).

Almost surely, 2^40378657015 is an apocalyptic number.

40378657015 is a deficient number, since it is larger than the sum of its proper divisors (8075731409).

40378657015 is an equidigital number, since it uses as much as digits as its factorization.

40378657015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075731408.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 40378657015 in words is "forty billion, three hundred seventy-eight million, six hundred fifty-seven thousand, fifteen".