7449664901551 has 4 divisors (see below), whose sum is σ = 7449859341504. Its totient is φ = 7449470461600.

The previous prime is 7449664901507. The next prime is 7449664901557. The reversal of 7449664901551 is 1551094669447.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7449664901551 - 2¹⁵ = 7449664868783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7449664901551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7449664901557) 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, 97162495 + ... + 97239136.

It is an arithmetic number, because the mean of its divisors is an integer number (1862464835376).

Almost surely, 2^{7449664901551} is an apocalyptic number.

7449664901551 is a deficient number, since it is larger than the sum of its proper divisors (194439953).

7449664901551 is a wasteful number, since it uses less digits than its factorization.

7449664901551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194439952.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 7449664901551 in words is "seven trillion, four hundred forty-nine billion, six hundred sixty-four million, nine hundred one thousand, five hundred fifty-one".