45404040402 has 128 divisors (see below), whose sum is σ = 122369978880. Its totient is φ = 12181985280.

The previous prime is 45404040397. The next prime is 45404040457. The reversal of 45404040402 is 20404040454.

It is a happy number.

45404040402 is a `hidden beast` number, since 4 + 540 + 40 + 40 + 40 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2928952 + ... + 2944412.

It is an arithmetic number, because the mean of its divisors is an integer number (956015460).

Almost surely, 2^45404040402 is an apocalyptic number.

45404040402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 45404040402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61184989440).

45404040402 is an abundant number, since it is smaller than the sum of its proper divisors (76965938478).

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

45404040402 is a wasteful number, since it uses less digits than its factorization.

45404040402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15953 (or 15947 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 45404040402 its reverse (20404040454), we get a palindrome (65808080856).

The spelling of 45404040402 in words is "forty-five billion, four hundred four million, forty thousand, four hundred two".