39940154747 has 4 divisors (see below), whose sum is σ = 39940648896. Its totient is φ = 39939660600.

The previous prime is 39940154731. The next prime is 39940154801. The reversal of 39940154747 is 74745104993.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 39940154747 - 2⁴ = 39940154731 is a prime.

It is a super-2 number, since 2×39940154747² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39940154707) 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, 94379 + ... + 297972.

It is an arithmetic number, because the mean of its divisors is an integer number (9985162224).

Almost surely, 2^39940154747 is an apocalyptic number.

39940154747 is a deficient number, since it is larger than the sum of its proper divisors (494149).

39940154747 is a wasteful number, since it uses less digits than its factorization.

39940154747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494148.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 39940154747 in words is "thirty-nine billion, nine hundred forty million, one hundred fifty-four thousand, seven hundred forty-seven".