61671621000 has 128 divisors (see below), whose sum is σ = 209907884160. Its totient is φ = 14950688000.

The previous prime is 61671620993. The next prime is 61671621007. The reversal of 61671621000 is 12617616.

It is an interprime number because it is at equal distance from previous prime (61671620993) and next prime (61671621007).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (61671621007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901419 + ... + 967418.

It is an arithmetic number, because the mean of its divisors is an integer number (1639905345).

Almost surely, 2^61671621000 is an apocalyptic number.

61671621000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61671621000 is an abundant number, since it is smaller than the sum of its proper divisors (148236263160).

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

61671621000 is a wasteful number, since it uses less digits than its factorization.

61671621000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868872 (or 1868858 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 61671621000 in words is "sixty-one billion, six hundred seventy-one million, six hundred twenty-one thousand".