85515143402 has 8 divisors (see below), whose sum is σ = 138139847076. Its totient is φ = 39468527712.

The previous prime is 85515143393. The next prime is 85515143407. The reversal of 85515143402 is 20434151558.

It can be written as a sum of positive squares in 2 ways, for example, as 79209036481 + 6306106921 = 281441^2 + 79411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (85515143407) 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, 1644521963 + ... + 1644522014.

Almost surely, 2^85515143402 is an apocalyptic number.

85515143402 is a deficient number, since it is larger than the sum of its proper divisors (52624703674).

85515143402 is a wasteful number, since it uses less digits than its factorization.

85515143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289043992.

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 85515143402 in words is "eighty-five billion, five hundred fifteen million, one hundred forty-three thousand, four hundred two".