1939516641618 has 32 divisors (see below), whose sum is σ = 3898729190400. Its totient is φ = 643223235600.

The previous prime is 1939516641599. The next prime is 1939516641649. The reversal of 1939516641618 is 8161466159391.

It is a super-2 number, since 2×1939516641618² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35012643 + ... + 35067993.

It is an arithmetic number, because the mean of its divisors is an integer number (121835287200).

Almost surely, 2^{1939516641618} is an apocalyptic number.

1939516641618 is an abundant number, since it is smaller than the sum of its proper divisors (1959212548782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1939516641618 is a wasteful number, since it uses less digits than its factorization.

1939516641618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84902.

The product of its digits is 8398080, while the sum is 60.

The spelling of 1939516641618 in words is "one trillion, nine hundred thirty-nine billion, five hundred sixteen million, six hundred forty-one thousand, six hundred eighteen".