919218706497 has 48 divisors (see below), whose sum is σ = 1652528142720. Its totient is φ = 479414681856.

The previous prime is 919218706477. The next prime is 919218706541. The reversal of 919218706497 is 794607812919.

It is not a de Polignac number, because 919218706497 - 2²² = 919214512193 is a prime.

It is a super-2 number, since 2×919218706497² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (919218706477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6232543 + ... + 6378324.

It is an arithmetic number, because the mean of its divisors is an integer number (34427669640).

Almost surely, 2^919218706497 is an apocalyptic number.

It is an amenable number.

919218706497 is a deficient number, since it is larger than the sum of its proper divisors (733309436223).

919218706497 is a wasteful number, since it uses less digits than its factorization.

919218706497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12610982 (or 12610979 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 919218706497 in words is "nine hundred nineteen billion, two hundred eighteen million, seven hundred six thousand, four hundred ninety-seven".