40172997802 has 24 divisors (see below), whose sum is σ = 70403925060. Its totient is φ = 17141806080.

The previous prime is 40172997773. The next prime is 40172997803. The reversal of 40172997802 is 20879927104.

It can be written as a sum of positive squares in 2 ways, for example, as 37318126041 + 2854871761 = 193179^2 + 53431^2 .

It is a super-2 number, since 2×40172997802² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (40172997803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872599 + ... + 917482.

Almost surely, 2^40172997802 is an apocalyptic number.

40172997802 is a deficient number, since it is larger than the sum of its proper divisors (30230927258).

40172997802 is a wasteful number, since it uses less digits than its factorization.

40172997802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790326 (or 1790319 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 40172997802 in words is "forty billion, one hundred seventy-two million, nine hundred ninety-seven thousand, eight hundred two".