40191261500 has 96 divisors (see below), whose sum is σ = 96728888256. Its totient is φ = 14494636800.

The previous prime is 40191261463. The next prime is 40191261533. The reversal of 40191261500 is 516219104.

It is a super-2 number, since 2×40191261500² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207602 + ... + 351398.

It is an arithmetic number, because the mean of its divisors is an integer number (1007592586).

Almost surely, 2^40191261500 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 40191261500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48364444128).

40191261500 is an abundant number, since it is smaller than the sum of its proper divisors (56537626756).

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

40191261500 is a wasteful number, since it uses less digits than its factorization.

40191261500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143872 (or 143860 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 40191261500 in words is "forty billion, one hundred ninety-one million, two hundred sixty-one thousand, five hundred".