70856551 has 2 divisors, whose sum is σ = 70856552. Its totient is φ = 70856550.

The previous prime is 70856531. The next prime is 70856579. The reversal of 70856551 is 15565807.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70856551 - 2¹⁹ = 70332263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70856551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70856531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35428275 + 35428276.

It is an arithmetic number, because the mean of its divisors is an integer number (35428276).

Almost surely, 2^70856551 is an apocalyptic number.

70856551 is a deficient number, since it is larger than the sum of its proper divisors (1).

70856551 is an equidigital number, since it uses as much as digits as its factorization.

70856551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 70856551 is about 8417.6333372273. The cubic root of 70856551 is about 413.8027154807.

The spelling of 70856551 in words is "seventy million, eight hundred fifty-six thousand, five hundred fifty-one".