70551638639 has 2 divisors, whose sum is σ = 70551638640. Its totient is φ = 70551638638.

The previous prime is 70551638623. The next prime is 70551638671. The reversal of 70551638639 is 93683615507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70551638639 - 2⁴ = 70551638623 is a prime.

It is a super-3 number, since 3×70551638639³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70551638039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35275819319 + 35275819320.

It is an arithmetic number, because the mean of its divisors is an integer number (35275819320).

Almost surely, 2^70551638639 is an apocalyptic number.

70551638639 is a deficient number, since it is larger than the sum of its proper divisors (1).

70551638639 is an equidigital number, since it uses as much as digits as its factorization.

70551638639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 53.

The spelling of 70551638639 in words is "seventy billion, five hundred fifty-one million, six hundred thirty-eight thousand, six hundred thirty-nine".