64247745740420 has 24 divisors (see below), whose sum is σ = 147185744787648. Its totient is φ = 23362816632800.

The previous prime is 64247745740377. The next prime is 64247745740471. The reversal of 64247745740420 is 2404754774246.

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, 146017603736 + ... + 146017604175.

It is an arithmetic number, because the mean of its divisors is an integer number (6132739366152).

Almost surely, 2^{64247745740420} is an apocalyptic number.

It is an amenable number.

64247745740420 is an abundant number, since it is smaller than the sum of its proper divisors (82937999047228).

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

64247745740420 is a wasteful number, since it uses less digits than its factorization.

64247745740420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292035207931 (or 292035207929 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 56.

The spelling of 64247745740420 in words is "sixty-four trillion, two hundred forty-seven billion, seven hundred forty-five million, seven hundred forty thousand, four hundred twenty".