1040037691391 has 4 divisors (see below), whose sum is σ = 1040201199984. Its totient is φ = 1039874182800.

The previous prime is 1040037691367. The next prime is 1040037691409. The reversal of 1040037691391 is 1931967300401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1040037691391 - 2⁶ = 1040037691327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040037691591) 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, 81744755 + ... + 81757476.

It is an arithmetic number, because the mean of its divisors is an integer number (260050299996).

Almost surely, 2^{1040037691391} is an apocalyptic number.

1040037691391 is a deficient number, since it is larger than the sum of its proper divisors (163508593).

1040037691391 is an equidigital number, since it uses as much as digits as its factorization.

1040037691391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163508592.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 1040037691391 in words is "one trillion, forty billion, thirty-seven million, six hundred ninety-one thousand, three hundred ninety-one".