40997081280 has 224 divisors, whose sum is σ = 138950760960. Its totient is φ = 10210959360.

The previous prime is 40997081267. The next prime is 40997081287. The reversal of 40997081280 is 8218079904.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (40997081287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1279212 + ... + 1310868.

Almost surely, 2^40997081280 is an apocalyptic number.

40997081280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40997081280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69475380480).

40997081280 is an abundant number, since it is smaller than the sum of its proper divisors (97953679680).

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

40997081280 is a wasteful number, since it uses less digits than its factorization.

40997081280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31767 (or 31757 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The spelling of 40997081280 in words is "forty billion, nine hundred ninety-seven million, eighty-one thousand, two hundred eighty".