40777020990 has 96 divisors (see below), whose sum is σ = 107118966240. Its totient is φ = 10761424128.

The previous prime is 40777020989. The next prime is 40777020997. The reversal of 40777020990 is 9902077704.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40777020997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10720429 + ... + 10724231.

It is an arithmetic number, because the mean of its divisors is an integer number (1115822565).

Almost surely, 2^40777020990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40777020990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53559483120).

40777020990 is an abundant number, since it is smaller than the sum of its proper divisors (66341945250).

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

40777020990 is a wasteful number, since it uses less digits than its factorization.

40777020990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 5015 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 40777020990 in words is "forty billion, seven hundred seventy-seven million, twenty thousand, nine hundred ninety".