7780378431 has 8 divisors (see below), whose sum is σ = 11855814784. Its totient is φ = 4445930520.

The previous prime is 7780378409. The next prime is 7780378447. The reversal of 7780378431 is 1348730877.

It is a happy number.

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

It is not a de Polignac number, because 7780378431 - 2⁶ = 7780378367 is a prime.

It is a super-2 number, since 2×7780378431² (a number of 21 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 (7780378031) 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, 185247085 + ... + 185247126.

It is an arithmetic number, because the mean of its divisors is an integer number (1481976848).

Almost surely, 2^7780378431 is an apocalyptic number.

7780378431 is a deficient number, since it is larger than the sum of its proper divisors (4075436353).

7780378431 is a wasteful number, since it uses less digits than its factorization.

7780378431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370494221.

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 7780378431 is about 88206.4534543817. The cubic root of 7780378431 is about 1981.5281226905.

The spelling of 7780378431 in words is "seven billion, seven hundred eighty million, three hundred seventy-eight thousand, four hundred thirty-one".