1015640894867 has 16 divisors (see below), whose sum is σ = 1114678635840. Its totient is φ = 921100250112.

The previous prime is 1015640894843. The next prime is 1015640894869. The reversal of 1015640894867 is 7684980465101.

It is a cyclic number.

It is not a de Polignac number, because 1015640894867 - 2¹⁶ = 1015640829331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1015640894869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1799858 + ... + 2295815.

It is an arithmetic number, because the mean of its divisors is an integer number (69667414740).

Almost surely, 2^{1015640894867} is an apocalyptic number.

1015640894867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1015640894867 is a deficient number, since it is larger than the sum of its proper divisors (99037740973).

1015640894867 is a wasteful number, since it uses less digits than its factorization.

1015640894867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096222.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 1015640894867 in words is "one trillion, fifteen billion, six hundred forty million, eight hundred ninety-four thousand, eight hundred sixty-seven".