40170780204555 has 128 divisors (see below), whose sum is σ = 86316895881216. Its totient is φ = 15406607462400.

The previous prime is 40170780204551. The next prime is 40170780204557. The reversal of 40170780204555 is 55540208707104.

It is not a de Polignac number, because 40170780204555 - 2² = 40170780204551 is a prime.

It is a super-2 number, since 2×40170780204555² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40170780204551) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 65113335 + ... + 65727375.

It is an arithmetic number, because the mean of its divisors is an integer number (674350749072).

Almost surely, 2^{40170780204555} is an apocalyptic number.

40170780204555 is an abundant number, since it is smaller than the sum of its proper divisors (46146115676661).

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

40170780204555 is a wasteful number, since it uses less digits than its factorization.

40170780204555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618437.

The product of its (nonzero) digits is 1568000, while the sum is 48.

The spelling of 40170780204555 in words is "forty trillion, one hundred seventy billion, seven hundred eighty million, two hundred four thousand, five hundred fifty-five".