76421381397 has 16 divisors (see below), whose sum is σ = 102512063808. Its totient is φ = 50639304320.

The previous prime is 76421381383. The next prime is 76421381431. The reversal of 76421381397 is 79318312467.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 76421381397 - 2¹² = 76421377301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76421381327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2105233 + ... + 2141225.

It is an arithmetic number, because the mean of its divisors is an integer number (6407003988).

Almost surely, 2^76421381397 is an apocalyptic number.

It is an amenable number.

76421381397 is a deficient number, since it is larger than the sum of its proper divisors (26090682411).

76421381397 is a wasteful number, since it uses less digits than its factorization.

76421381397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40260.

The product of its digits is 1524096, while the sum is 51.

The spelling of 76421381397 in words is "seventy-six billion, four hundred twenty-one million, three hundred eighty-one thousand, three hundred ninety-seven".