40348080781 has 4 divisors (see below), whose sum is σ = 42471664000. Its totient is φ = 38224497564.

The previous prime is 40348080761. The next prime is 40348080803. The reversal of 40348080781 is 18708084304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40348080781 - 2³⁵ = 5988342413 is a prime.

It is a super-2 number, since 2×40348080781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40348080761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061791581 + ... + 1061791618.

It is an arithmetic number, because the mean of its divisors is an integer number (10617916000).

Almost surely, 2^40348080781 is an apocalyptic number.

It is an amenable number.

40348080781 is a deficient number, since it is larger than the sum of its proper divisors (2123583219).

40348080781 is a wasteful number, since it uses less digits than its factorization.

40348080781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123583218.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 40348080781 in words is "forty billion, three hundred forty-eight million, eighty thousand, seven hundred eighty-one".