64902085740 has 36 divisors (see below), whose sum is σ = 196869660624. Its totient is φ = 17307222816.

The previous prime is 64902085723. The next prime is 64902085747. The reversal of 64902085740 is 4758020946.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64902085740² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (64902085747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180283392 + ... + 180283751.

It is an arithmetic number, because the mean of its divisors is an integer number (5468601684).

Almost surely, 2^64902085740 is an apocalyptic number.

64902085740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64902085740 is an abundant number, since it is smaller than the sum of its proper divisors (131967574884).

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

64902085740 is a wasteful number, since it uses less digits than its factorization.

64902085740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360567158 (or 360567153 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 64902085740 in words is "sixty-four billion, nine hundred two million, eighty-five thousand, seven hundred forty".