72770879999 has 4 divisors (see below), whose sum is σ = 72771501000. Its totient is φ = 72770259000.

The previous prime is 72770879933. The next prime is 72770880037. The reversal of 72770879999 is 99997807727.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72770879999 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 (72770779999) 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, 75377 + ... + 388874.

It is an arithmetic number, because the mean of its divisors is an integer number (18192875250).

Almost surely, 2^72770879999 is an apocalyptic number.

72770879999 is a deficient number, since it is larger than the sum of its proper divisors (621001).

72770879999 is a wasteful number, since it uses less digits than its factorization.

72770879999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621000.

The product of its (nonzero) digits is 252047376, while the sum is 74.

The spelling of 72770879999 in words is "seventy-two billion, seven hundred seventy million, eight hundred seventy-nine thousand, nine hundred ninety-nine".