7891452551 has 4 divisors (see below), whose sum is σ = 7965204552. Its totient is φ = 7817700552.

The previous prime is 7891452511. The next prime is 7891452563. The reversal of 7891452551 is 1552541987.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1552541987 = 193 ⋅8044259.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7891452551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7891452496 and 7891452505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7891452511) 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, 36875840 + ... + 36876053.

It is an arithmetic number, because the mean of its divisors is an integer number (1991301138).

Almost surely, 2^7891452551 is an apocalyptic number.

7891452551 is a deficient number, since it is larger than the sum of its proper divisors (73752001).

7891452551 is a wasteful number, since it uses less digits than its factorization.

7891452551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73752000.

The product of its digits is 504000, while the sum is 47.

The square root of 7891452551 is about 88833.8480028868. The cubic root of 7891452551 is about 1990.9131564124.

The spelling of 7891452551 in words is "seven billion, eight hundred ninety-one million, four hundred fifty-two thousand, five hundred fifty-one".