87128736262 has 4 divisors (see below), whose sum is σ = 130693104396. Its totient is φ = 43564368130.

The previous prime is 87128736239. The next prime is 87128736269. The reversal of 87128736262 is 26263782178.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×87128736262² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87128736269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21782184064 + ... + 21782184067.

It is an arithmetic number, because the mean of its divisors is an integer number (32673276099).

Almost surely, 2^87128736262 is an apocalyptic number.

87128736262 is a deficient number, since it is larger than the sum of its proper divisors (43564368134).

87128736262 is a wasteful number, since it uses less digits than its factorization.

87128736262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43564368133.

The product of its digits is 2709504, while the sum is 52.

The spelling of 87128736262 in words is "eighty-seven billion, one hundred twenty-eight million, seven hundred thirty-six thousand, two hundred sixty-two".