40206135556 has 12 divisors (see below), whose sum is σ = 70676257792. Its totient is φ = 20012919048.

The previous prime is 40206135547. The next prime is 40206135559. The reversal of 40206135556 is 65553160204.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40206135559) 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, 22536180 + ... + 22537963.

Almost surely, 2^40206135556 is an apocalyptic number.

It is an amenable number.

40206135556 is a deficient number, since it is larger than the sum of its proper divisors (30470122236).

40206135556 is a wasteful number, since it uses less digits than its factorization.

40206135556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45074370 (or 45074368 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 40206135556 in words is "forty billion, two hundred six million, one hundred thirty-five thousand, five hundred fifty-six".