64561213402 has 16 divisors (see below), whose sum is σ = 114492792960. Its totient is φ = 26714984688.

The previous prime is 64561213393. The next prime is 64561213411. The reversal of 64561213402 is 20431216546.

It is an interprime number because it is at equal distance from previous prime (64561213393) and next prime (64561213411).

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, 79508478 + ... + 79509289.

It is an arithmetic number, because the mean of its divisors is an integer number (7155799560).

Almost surely, 2^64561213402 is an apocalyptic number.

64561213402 is a deficient number, since it is larger than the sum of its proper divisors (49931579558).

64561213402 is a wasteful number, since it uses less digits than its factorization.

64561213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159017805.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 64561213402 its reverse (20431216546), we get a palindrome (84992429948).

The spelling of 64561213402 in words is "sixty-four billion, five hundred sixty-one million, two hundred thirteen thousand, four hundred two".