64211902 has 4 divisors (see below), whose sum is σ = 96317856. Its totient is φ = 32105950.

The previous prime is 64211897. The next prime is 64211947. The reversal of 64211902 is 20911246.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16052974 + ... + 16052977.

It is an arithmetic number, because the mean of its divisors is an integer number (24079464).

Almost surely, 2^64211902 is an apocalyptic number.

64211902 is a deficient number, since it is larger than the sum of its proper divisors (32105954).

64211902 is a wasteful number, since it uses less digits than its factorization.

64211902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32105953.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 64211902 is about 8013.2329305967. The cubic root of 64211902 is about 400.4409761714.

It can be divided in two parts, 642 and 11902, that added together give a square (12544 = 112²).

The spelling of 64211902 in words is "sixty-four million, two hundred eleven thousand, nine hundred two".