70578551 has 2 divisors, whose sum is σ = 70578552. Its totient is φ = 70578550.

The previous prime is 70578539. The next prime is 70578553. The reversal of 70578551 is 15587507.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70578551 - 2¹⁰ = 70577527 is a prime.

It is a super-2 number, since 2×70578551² = 9962663722519202, which contains 22 as substring.

Together with 70578553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70578553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35289275 + 35289276.

It is an arithmetic number, because the mean of its divisors is an integer number (35289276).

Almost surely, 2^70578551 is an apocalyptic number.

70578551 is a deficient number, since it is larger than the sum of its proper divisors (1).

70578551 is an equidigital number, since it uses as much as digits as its factorization.

70578551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 70578551 is about 8401.1041536217. The cubic root of 70578551 is about 413.2608322513.

The spelling of 70578551 in words is "seventy million, five hundred seventy-eight thousand, five hundred fifty-one".