70138897919 has 4 divisors (see below), whose sum is σ = 71631214944. Its totient is φ = 68646580896.

The previous prime is 70138897909. The next prime is 70138897921. The reversal of 70138897919 is 91979883107.

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

It is a cyclic number.

It is not a de Polignac number, because 70138897919 - 2⁴ = 70138897903 is a prime.

It is a super-2 number, since 2×70138897919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70138897909) 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, 746158442 + ... + 746158535.

It is an arithmetic number, because the mean of its divisors is an integer number (17907803736).

Almost surely, 2^70138897919 is an apocalyptic number.

70138897919 is a deficient number, since it is larger than the sum of its proper divisors (1492317025).

70138897919 is a wasteful number, since it uses less digits than its factorization.

70138897919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492317024.

The product of its (nonzero) digits is 6858432, while the sum is 62.

The spelling of 70138897919 in words is "seventy billion, one hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred nineteen".