40135903878 has 16 divisors (see below), whose sum is σ = 91739208960. Its totient is φ = 11467401096.

The previous prime is 40135903861. The next prime is 40135903879. The reversal of 40135903878 is 87830953104.

It is a super-2 number, since 2×40135903878² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135903879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477808338 + ... + 477808421.

It is an arithmetic number, because the mean of its divisors is an integer number (5733700560).

Almost surely, 2^40135903878 is an apocalyptic number.

40135903878 is an abundant number, since it is smaller than the sum of its proper divisors (51603305082).

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

40135903878 is a wasteful number, since it uses less digits than its factorization.

40135903878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955616771.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 40135903878 in words is "forty billion, one hundred thirty-five million, nine hundred three thousand, eight hundred seventy-eight".