7671212378 has 4 divisors (see below), whose sum is σ = 11506818570. Its totient is φ = 3835606188.

The previous prime is 7671212377. The next prime is 7671212383. The reversal of 7671212378 is 8732121767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8732121767 = 37 ⋅236003291.

It can be written as a sum of positive squares in only one way, i.e., 6446002369 + 1225210009 = 80287^2 + 35003^2 .

It is not an unprimeable number, because it can be changed into a prime (7671212371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1917803093 + ... + 1917803096.

Almost surely, 2^7671212378 is an apocalyptic number.

7671212378 is a deficient number, since it is larger than the sum of its proper divisors (3835606192).

7671212378 is a wasteful number, since it uses less digits than its factorization.

7671212378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835606191.

The product of its digits is 197568, while the sum is 44.

The square root of 7671212378 is about 87585.4575714485. The cubic root of 7671212378 is about 1972.2168674279.

The spelling of 7671212378 in words is "seven billion, six hundred seventy-one million, two hundred twelve thousand, three hundred seventy-eight".