74187048961 has 4 divisors (see below), whose sum is σ = 75080868912. Its totient is φ = 73293229012.

The previous prime is 74187048919. The next prime is 74187048983. The reversal of 74187048961 is 16984078147.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16984078147 = 21871 ⋅776557.

It is a cyclic number.

It is not a de Polignac number, because 74187048961 - 2¹³ = 74187040769 is a prime.

It is a super-2 number, since 2×74187048961² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74157048961) 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, 446909851 + ... + 446910016.

It is an arithmetic number, because the mean of its divisors is an integer number (18770217228).

Almost surely, 2^74187048961 is an apocalyptic number.

It is an amenable number.

74187048961 is a deficient number, since it is larger than the sum of its proper divisors (893819951).

74187048961 is an equidigital number, since it uses as much as digits as its factorization.

74187048961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893819950.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 74187048961 in words is "seventy-four billion, one hundred eighty-seven million, forty-eight thousand, nine hundred sixty-one".