651206501401 has 4 divisors (see below), whose sum is σ = 655891440400. Its totient is φ = 646521562404.

The previous prime is 651206501347. The next prime is 651206501417. The reversal of 651206501401 is 104105602156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651206501401 - 2¹³ = 651206493209 is a prime.

It is a super-2 number, since 2×651206501401² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651206501471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342469291 + ... + 2342469568.

It is an arithmetic number, because the mean of its divisors is an integer number (163972860100).

Almost surely, 2^651206501401 is an apocalyptic number.

It is an amenable number.

651206501401 is a deficient number, since it is larger than the sum of its proper divisors (4684938999).

651206501401 is a wasteful number, since it uses less digits than its factorization.

651206501401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684938998.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 651206501401 in words is "six hundred fifty-one billion, two hundred six million, five hundred one thousand, four hundred one".