651554539240 has 32 divisors (see below), whose sum is σ = 1599270233760. Its totient is φ = 236928923200.

The previous prime is 651554539219. The next prime is 651554539241. The reversal of 651554539240 is 42935455156.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (651554539241) 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, 740402446 + ... + 740403325.

It is an arithmetic number, because the mean of its divisors is an integer number (49977194805).

Almost surely, 2^651554539240 is an apocalyptic number.

It is an amenable number.

651554539240 is an abundant number, since it is smaller than the sum of its proper divisors (947715694520).

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

651554539240 is a wasteful number, since it uses less digits than its factorization.

651554539240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480805793 (or 1480805789 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 651554539240 in words is "six hundred fifty-one billion, five hundred fifty-four million, five hundred thirty-nine thousand, two hundred forty".