40277801655 has 48 divisors (see below), whose sum is σ = 85925985600. Its totient is φ = 16996345344.

The previous prime is 40277801653. The next prime is 40277801717. The reversal of 40277801655 is 55610877204.

40277801655 is a `hidden beast` number, since 402 + 7 + 7 + 80 + 165 + 5 = 666.

It is not a de Polignac number, because 40277801655 - 2¹ = 40277801653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40277801655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40277801653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4913830 + ... + 4922019.

It is an arithmetic number, because the mean of its divisors is an integer number (1790124700).

Almost surely, 2^40277801655 is an apocalyptic number.

40277801655 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40277801655 is an abundant number, since it is smaller than the sum of its proper divisors (45648183945).

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

40277801655 is a wasteful number, since it uses less digits than its factorization.

40277801655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835880 (or 9835877 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 40277801655 in words is "forty billion, two hundred seventy-seven million, eight hundred one thousand, six hundred fifty-five".