649491622980 has 24 divisors (see below), whose sum is σ = 1818576544512. Its totient is φ = 173197766112.

The previous prime is 649491622933. The next prime is 649491623119. The reversal of 649491622980 is 89226194946.

649491622980 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 10824860383 = 649491622980 / (6 + 4 + 9 + 4 + 9 + 1 + 6 + 2 + 2 + 9 + 8 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5412430132 + ... + 5412430251.

It is an arithmetic number, because the mean of its divisors is an integer number (75774022688).

Almost surely, 2^649491622980 is an apocalyptic number.

649491622980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

649491622980 is an abundant number, since it is smaller than the sum of its proper divisors (1169084921532).

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

649491622980 is a wasteful number, since it uses less digits than its factorization.

649491622980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824860395 (or 10824860393 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 60.

The spelling of 649491622980 in words is "six hundred forty-nine billion, four hundred ninety-one million, six hundred twenty-two thousand, nine hundred eighty".