4015391666540 has 12 divisors (see below), whose sum is σ = 8432322499776. Its totient is φ = 1606156666608.

The previous prime is 4015391666513. The next prime is 4015391666563. The reversal of 4015391666540 is 456661935104.

It is a super-2 number, since 2×4015391666540² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100384791644 + ... + 100384791683.

It is an arithmetic number, because the mean of its divisors is an integer number (702693541648).

Almost surely, 2^{4015391666540} is an apocalyptic number.

It is an amenable number.

4015391666540 is an abundant number, since it is smaller than the sum of its proper divisors (4416930833236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4015391666540 is a wasteful number, since it uses less digits than its factorization.

4015391666540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200769583336 (or 200769583334 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 4015391666540 in words is "four trillion, fifteen billion, three hundred ninety-one million, six hundred sixty-six thousand, five hundred forty".