61645190622 has 32 divisors (see below), whose sum is σ = 124840068480. Its totient is φ = 20291191200.

The previous prime is 61645190587. The next prime is 61645190627. The reversal of 61645190622 is 22609154616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61645190627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95473 + ... + 363875.

It is an arithmetic number, because the mean of its divisors is an integer number (3901252140).

Almost surely, 2^61645190622 is an apocalyptic number.

61645190622 is an abundant number, since it is smaller than the sum of its proper divisors (63194877858).

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

61645190622 is a wasteful number, since it uses less digits than its factorization.

61645190622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268888.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 61645190622 in words is "sixty-one billion, six hundred forty-five million, one hundred ninety thousand, six hundred twenty-two".