40977894387 has 18 divisors (see below), whose sum is σ = 55430522436. Its totient is φ = 26927539200.

The previous prime is 40977894379. The next prime is 40977894413. The reversal of 40977894387 is 78349877904.

It is a happy number.

It is not a de Polignac number, because 40977894387 - 2³ = 40977894379 is a prime.

It is a super-2 number, since 2×40977894387² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40977894487) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 25594387 + ... + 25595987.

Almost surely, 2^40977894387 is an apocalyptic number.

40977894387 is a deficient number, since it is larger than the sum of its proper divisors (14452628049).

40977894387 is an frugal number, since it uses more digits than its factorization.

40977894387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 85349376, while the sum is 66.

The spelling of 40977894387 in words is "forty billion, nine hundred seventy-seven million, eight hundred ninety-four thousand, three hundred eighty-seven".