64836017190 has 128 divisors (see below), whose sum is σ = 197683200000. Its totient is φ = 14813083008.

The previous prime is 64836017173. The next prime is 64836017201. The reversal of 64836017190 is 9171063846.

It is a happy number.

It is a super-2 number, since 2×64836017190² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5189371 + ... + 5201849.

It is an arithmetic number, because the mean of its divisors is an integer number (1544400000).

Almost surely, 2^64836017190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64836017190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98841600000).

64836017190 is an abundant number, since it is smaller than the sum of its proper divisors (132847182810).

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

64836017190 is a wasteful number, since it uses less digits than its factorization.

64836017190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251 (or 15245 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 64836017190 in words is "sixty-four billion, eight hundred thirty-six million, seventeen thousand, one hundred ninety".