70077438837781 has 4 divisors (see below), whose sum is σ = 70101528713100. Its totient is φ = 70053348962464.

The previous prime is 70077438837767. The next prime is 70077438837839. The reversal of 70077438837781 is 18773883477007.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67339108893681 + 2738329944100 = 8206041^2 + 1654790^2 .

It is a cyclic number.

It is not a de Polignac number, because 70077438837781 - 2²⁷ = 70077304620053 is a prime.

It is a super-2 number, since 2×70077438837781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70077438837781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70077438831781) 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, 12044933296 + ... + 12044939113.

It is an arithmetic number, because the mean of its divisors is an integer number (17525382178275).

Almost surely, 2^{70077438837781} is an apocalyptic number.

It is an amenable number.

70077438837781 is a deficient number, since it is larger than the sum of its proper divisors (24089875319).

70077438837781 is a wasteful number, since it uses less digits than its factorization.

70077438837781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24089875318.

The product of its (nonzero) digits is 309786624, while the sum is 70.

The spelling of 70077438837781 in words is "seventy trillion, seventy-seven billion, four hundred thirty-eight million, eight hundred thirty-seven thousand, seven hundred eighty-one".