65420737240 has 32 divisors (see below), whose sum is σ = 153596515680. Its totient is φ = 25030542592.

The previous prime is 65420737219. The next prime is 65420737247. The reversal of 65420737240 is 4273702456.

It is a happy number.

It is a super-2 number, since 2×65420737240² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 65420737193 and 65420737202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65420737247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35553829 + ... + 35555668.

It is an arithmetic number, because the mean of its divisors is an integer number (4799891115).

Almost surely, 2^65420737240 is an apocalyptic number.

It is an amenable number.

65420737240 is an abundant number, since it is smaller than the sum of its proper divisors (88175778440).

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

65420737240 is a wasteful number, since it uses less digits than its factorization.

65420737240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71109531 (or 71109527 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 40.

The spelling of 65420737240 in words is "sixty-five billion, four hundred twenty million, seven hundred thirty-seven thousand, two hundred forty".