81200987662 has 16 divisors (see below), whose sum is σ = 129048035760. Its totient is φ = 38188003968.

The previous prime is 81200987657. The next prime is 81200987663. The reversal of 81200987662 is 26678900218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81200987663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702573 + ... + 809944.

It is an arithmetic number, because the mean of its divisors is an integer number (8065502235).

Almost surely, 2^81200987662 is an apocalyptic number.

81200987662 is a deficient number, since it is larger than the sum of its proper divisors (47847048098).

81200987662 is a wasteful number, since it uses less digits than its factorization.

81200987662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514115.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 81200987662 in words is "eighty-one billion, two hundred million, nine hundred eighty-seven thousand, six hundred sixty-two".