77401145 has 8 divisors (see below), whose sum is σ = 96084360. Its totient is φ = 59785600.

The previous prime is 77401133. The next prime is 77401171. The reversal of 77401145 is 54110477.

It can be written as a sum of positive squares in 4 ways, for example, as 891136 + 76510009 = 944^2 + 8747^2 .

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

It is not a de Polignac number, because 77401145 - 2⁶ = 77401081 is a prime.

It is a super-2 number, since 2×77401145² = 11981874494622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266756 + ... + 267045.

It is an arithmetic number, because the mean of its divisors is an integer number (12010545).

Almost surely, 2^77401145 is an apocalyptic number.

It is an amenable number.

77401145 is a deficient number, since it is larger than the sum of its proper divisors (18683215).

77401145 is a wasteful number, since it uses less digits than its factorization.

77401145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533835.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 77401145 is about 8797.7920525550. The cubic root of 77401145 is about 426.1695949450.

The spelling of 77401145 in words is "seventy-seven million, four hundred one thousand, one hundred forty-five".