40778231381 has 8 divisors (see below), whose sum is σ = 43204674240. Its totient is φ = 38354868928.

The previous prime is 40778231359. The next prime is 40778231383. The reversal of 40778231381 is 18313287704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40778231381 - 2¹⁰ = 40778230357 is a prime.

It is a super-2 number, since 2×40778231381² (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 (40778231383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742811 + ... + 795816.

It is an arithmetic number, because the mean of its divisors is an integer number (5400584280).

Almost surely, 2^40778231381 is an apocalyptic number.

It is an amenable number.

40778231381 is a deficient number, since it is larger than the sum of its proper divisors (2426442859).

40778231381 is a wasteful number, since it uses less digits than its factorization.

40778231381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540203.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 40778231381 in words is "forty billion, seven hundred seventy-eight million, two hundred thirty-one thousand, three hundred eighty-one".