40155426420 has 96 divisors (see below), whose sum is σ = 113529335808. Its totient is φ = 10604224512.

The previous prime is 40155426401. The next prime is 40155426439. The reversal of 40155426420 is 2462455104.

It is an interprime number because it is at equal distance from previous prime (40155426401) and next prime (40155426439).

It is a super-2 number, since 2×40155426420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4392174 + ... + 4401306.

It is an arithmetic number, because the mean of its divisors is an integer number (1182597248).

Almost surely, 2^40155426420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40155426420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56764667904).

40155426420 is an abundant number, since it is smaller than the sum of its proper divisors (73373909388).

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

40155426420 is a wasteful number, since it uses less digits than its factorization.

40155426420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9849 (or 9847 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 40155426420 in words is "forty billion, one hundred fifty-five million, four hundred twenty-six thousand, four hundred twenty".