40040623551 has 4 divisors (see below), whose sum is σ = 53387498072. Its totient is φ = 26693749032.

The previous prime is 40040623531. The next prime is 40040623559. The reversal of 40040623551 is 15532604004.

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

It is a de Polignac number, because none of the positive numbers 2^k-40040623551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040623559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673437256 + ... + 6673437261.

It is an arithmetic number, because the mean of its divisors is an integer number (13346874518).

Almost surely, 2^40040623551 is an apocalyptic number.

40040623551 is a deficient number, since it is larger than the sum of its proper divisors (13346874521).

40040623551 is a wasteful number, since it uses less digits than its factorization.

40040623551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346874520.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 40040623551 in words is "forty billion, forty million, six hundred twenty-three thousand, five hundred fifty-one".