64749068662747 has 16 divisors (see below), whose sum is σ = 74069897932800. Its totient is φ = 55446005073888.

The previous prime is 64749068662727. The next prime is 64749068662787. The reversal of 64749068662747 is 74726686094746.

It is a cyclic number.

It is not a de Polignac number, because 64749068662747 - 2²³ = 64749060274139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64749068662727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29972893 + ... + 32060449.

It is an arithmetic number, because the mean of its divisors is an integer number (4629368620800).

Almost surely, 2^{64749068662747} is an apocalyptic number.

64749068662747 is a deficient number, since it is larger than the sum of its proper divisors (9320829270053).

64749068662747 is a wasteful number, since it uses less digits than its factorization.

64749068662747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091810.

The product of its (nonzero) digits is 4096770048, while the sum is 76.

The spelling of 64749068662747 in words is "sixty-four trillion, seven hundred forty-nine billion, sixty-eight million, six hundred sixty-two thousand, seven hundred forty-seven".