73978451571 has 8 divisors (see below), whose sum is σ = 98674986240. Its totient is φ = 49300442312.

The previous prime is 73978451567. The next prime is 73978451597. The reversal of 73978451571 is 17515487937.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73978451571 - 2² = 73978451567 is a prime.

It is a super-2 number, since 2×73978451571² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73978451551) 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, 4622031 + ... + 4638008.

It is an arithmetic number, because the mean of its divisors is an integer number (12334373280).

Almost surely, 2^73978451571 is an apocalyptic number.

73978451571 is a deficient number, since it is larger than the sum of its proper divisors (24696534669).

73978451571 is a wasteful number, since it uses less digits than its factorization.

73978451571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262705.

The product of its digits is 7408800, while the sum is 57.

The spelling of 73978451571 in words is "seventy-three billion, nine hundred seventy-eight million, four hundred fifty-one thousand, five hundred seventy-one".