40405351040 has 64 divisors (see below), whose sum is σ = 98649308160. Its totient is φ = 15818253312.

The previous prime is 40405351031. The next prime is 40405351079. The reversal of 40405351040 is 4015350404.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641552 + ... + 701711.

It is an arithmetic number, because the mean of its divisors is an integer number (1541395440).

Almost surely, 2^40405351040 is an apocalyptic number.

40405351040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40405351040 is an abundant number, since it is smaller than the sum of its proper divisors (58243957120).

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

40405351040 is a wasteful number, since it uses less digits than its factorization.

40405351040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343329 (or 1343317 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The spelling of 40405351040 in words is "forty billion, four hundred five million, three hundred fifty-one thousand, forty".