70621433509 has 4 divisors (see below), whose sum is σ = 77041563840. Its totient is φ = 64201303180.

The previous prime is 70621433483. The next prime is 70621433521. The reversal of 70621433509 is 90533412607.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70621433509 - 2²¹ = 70619336357 is a prime.

It is a super-2 number, since 2×70621433509² (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 (70621433539) 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, 3210065149 + ... + 3210065170.

It is an arithmetic number, because the mean of its divisors is an integer number (19260390960).

Almost surely, 2^70621433509 is an apocalyptic number.

It is an amenable number.

70621433509 is a deficient number, since it is larger than the sum of its proper divisors (6420130331).

70621433509 is a wasteful number, since it uses less digits than its factorization.

70621433509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6420130330.

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 70621433509 in words is "seventy billion, six hundred twenty-one million, four hundred thirty-three thousand, five hundred nine".