40121505240 has 64 divisors (see below), whose sum is σ = 120377836800. Its totient is φ = 10697884032.

The previous prime is 40121505169. The next prime is 40121505241. The reversal of 40121505240 is 4250512104.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40121505240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40121505241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1871301 + ... + 1892619.

It is an arithmetic number, because the mean of its divisors is an integer number (1880903700).

Almost surely, 2^40121505240 is an apocalyptic number.

40121505240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40121505240 is an abundant number, since it is smaller than the sum of its proper divisors (80256331560).

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

40121505240 is a wasteful number, since it uses less digits than its factorization.

40121505240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37016 (or 37012 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 40121505240 in words is "forty billion, one hundred twenty-one million, five hundred five thousand, two hundred forty".