40399899951 has 32 divisors (see below), whose sum is σ = 59161259520. Its totient is φ = 24420178944.

The previous prime is 40399899941. The next prime is 40399899959. The reversal of 40399899951 is 15999899304.

It is not a de Polignac number, because 40399899951 - 2¹⁴ = 40399883567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40399899959) 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, 33910 + ... + 286268.

It is an arithmetic number, because the mean of its divisors is an integer number (1848789360).

Almost surely, 2^40399899951 is an apocalyptic number.

40399899951 is a deficient number, since it is larger than the sum of its proper divisors (18761359569).

40399899951 is a wasteful number, since it uses less digits than its factorization.

40399899951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252495.

The product of its (nonzero) digits is 28343520, while the sum is 66.

The spelling of 40399899951 in words is "forty billion, three hundred ninety-nine million, eight hundred ninety-nine thousand, nine hundred fifty-one".