1639677139490 has 32 divisors (see below), whose sum is σ = 3179166290496. Its totient is φ = 605283019200.

The previous prime is 1639677139459. The next prime is 1639677139511. The reversal of 1639677139490 is 949317769361.

It is a super-2 number, since 2×1639677139490² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

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, 838232 + ... + 1995491.

It is an arithmetic number, because the mean of its divisors is an integer number (99348946578).

Almost surely, 2^{1639677139490} is an apocalyptic number.

1639677139490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1639677139490 is a deficient number, since it is larger than the sum of its proper divisors (1539489151006).

1639677139490 is a wasteful number, since it uses less digits than its factorization.

1639677139490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838194.

The product of its (nonzero) digits is 46294416, while the sum is 65.

The spelling of 1639677139490 in words is "one trillion, six hundred thirty-nine billion, six hundred seventy-seven million, one hundred thirty-nine thousand, four hundred ninety".