38777523421 has 12 divisors (see below), whose sum is σ = 48578436732. Its totient is φ = 30681116928.

The previous prime is 38777523403. The next prime is 38777523439. The reversal of 38777523421 is 12432577783.

It is an interprime number because it is at equal distance from previous prime (38777523403) and next prime (38777523439).

It can be written as a sum of positive squares in 2 ways, for example, as 6337911321 + 32439612100 = 79611^2 + 180110^2 .

It is not a de Polignac number, because 38777523421 - 2⁷ = 38777523293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38777523461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30436980 + ... + 30438253.

It is an arithmetic number, because the mean of its divisors is an integer number (4048203061).

Almost surely, 2^38777523421 is an apocalyptic number.

It is an amenable number.

38777523421 is a deficient number, since it is larger than the sum of its proper divisors (9800913311).

38777523421 is a wasteful number, since it uses less digits than its factorization.

38777523421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60875260 (or 60875253 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 49.

The spelling of 38777523421 in words is "thirty-eight billion, seven hundred seventy-seven million, five hundred twenty-three thousand, four hundred twenty-one".