78077578001 has 4 divisors (see below), whose sum is σ = 78078137712. Its totient is φ = 78077018292.

The previous prime is 78077577989. The next prime is 78077578043. The reversal of 78077578001 is 10087577087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 78077578001 - 2²⁶ = 78010469137 is a prime.

It is a super-2 number, since 2×78077578001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78077575001) 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, 116630 + ... + 412016.

It is an arithmetic number, because the mean of its divisors is an integer number (19519534428).

Almost surely, 2^78077578001 is an apocalyptic number.

It is an amenable number.

78077578001 is a deficient number, since it is larger than the sum of its proper divisors (559711).

78077578001 is a wasteful number, since it uses less digits than its factorization.

78077578001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559710.

The product of its (nonzero) digits is 768320, while the sum is 50.

The spelling of 78077578001 in words is "seventy-eight billion, seventy-seven million, five hundred seventy-eight thousand, one".