69721428435 has 32 divisors (see below), whose sum is σ = 117459970560. Its totient is φ = 35217347328.

The previous prime is 69721428421. The next prime is 69721428443. The reversal of 69721428435 is 53482412796.

It is not a de Polignac number, because 69721428435 - 2¹³ = 69721420243 is a prime.

It is a super-2 number, since 2×69721428435² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 989962 + ... + 1058048.

It is an arithmetic number, because the mean of its divisors is an integer number (3670624080).

Almost surely, 2^69721428435 is an apocalyptic number.

69721428435 is a deficient number, since it is larger than the sum of its proper divisors (47738542125).

69721428435 is a wasteful number, since it uses less digits than its factorization.

69721428435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71707.

The product of its digits is 2903040, while the sum is 51.

The spelling of 69721428435 in words is "sixty-nine billion, seven hundred twenty-one million, four hundred twenty-eight thousand, four hundred thirty-five".